Key Takeaways

• Agricultural drone work can enhance the management of pasture, hay, and alfalfa by addressing challenges like musk thistle invasion.
• The Revolution Drones I-19 offers efficient herbicide applications without disturbing the soil, making it ideal for wet conditions.
• Drone applications allow for precise targeting of problem areas, reducing chemical use while maximizing effectiveness.
• They can assist in weed control, alfalfa stand mapping, and even seeding without the downsides of traditional methods.
• Using drones for pasture management can also qualify for tax credits under R&D activities, providing additional financial benefits.

Some of the most beautiful agricultural land in NE Kansas may not involve row crops. Instead, it may be the pastures, hay meadows, and alfalfa fields that provide forage for livestock operations. Agricultural drone work has traditionally focused on row crops, but I think that these forage fields can also benefit from ag drones. Flying these pasture, hay, and alfalfa acres allows these areas to maximize their input as a major part of NE Kansas economy.

The Problem for Every Pasture, Hay, and Alfalfa Field

Drive on many of the gravel roads in Brown or Doniphan County (or neighboring counties) in late May and you’ll spot the issue: The purple powder-puff flowers of musk thistle blooming along fence lines, in the low corners of pastures, and creeping into hay ground. They are pretty, in an irritating sort of way.

Musk thistle (Carduus nutans) is a Category C noxious weed in Kansas. State law requires that landowners control it. It’s not optional. And the biology of this plant makes the timing of control critical. A single plant can produce more than 10,000 seeds, and those seeds can remain viable in the soil for a decade or more. Miss the spray window by a few weeks, and you’re not just dealing with this year’s problem. You are also supporting the problem in future years.

The challenge for pasture operators has always been access and timing. Musk thistle is most susceptible to herbicide treatment during its rosette stage. This is either in the fall before it overwinters, or in the early spring before it bolts. Both windows are often wet. Ground rigs will have real problems getting into the fields during these windows. The patches that need spraying most are rarely the patches that are easiest to reach.

This is exactly the problem drone spray pasture applications solve.

How can the Revolution Drones I-19 Help?

I currently fly the Revolution Drones Independence-19 (aka, “The I-19”) and it’s worth understanding what that aircraft is actually capable of before writing off drone application as a niche tool useful only for large row crop operations.

The I-19 can handle both liquid herbicide application and dry granular application on the same platform. It runs RTK GPS guidance for high pass-to-pass accuracy, and its obstacle avoidance system lets it work confidently in and around the tree lines, terraces, and creek draws that define pasture, hay and even alfalfa ground in NE Kansas. It can dispense up to 20 gallons per flight (when overfilled) and up to 175lbs of granular material! Under good conditions with efficient support, the I-19 can cover up to 750 acres a day.

That’s not a toy. That’s a purpose-built agricultural aircraft.

More importantly, the I-19 operates without the ground pressure of any wheeled or tracked equipment. It doesn’t compact wet soil in draws. It doesn’t tear up the fescue stand you’ve spent three years building. It doesn’t get stuck in the creek bottom where your worst thistle patches tend to concentrate. And because it can switch between spray, spread, and seed operations the same platform, one day can accomplish what would otherwise require multiple equipment passes and multiple days of field access.

Here’s how I think a typical pasture herbicide works best:

• We plan ahead and walk your fence lines in early spring and flag the concerning areas using the RTK tools. Or, even better, I fly a scouting pass first to map what’s actually out there and define obstacles. Drone cameras can clearly locate musk thistle rosettes against dormant grass from 50 feet up, even before the plants are easy to see from the ground.
• We schedule the application to occur at the most impactful time.
• We use an approved herbicide like dicamba, picloram, and aminopyralid (Milestone). Label rates for aerial herbicide are typically 3 to 5 gallons of carrier per acre for aerial herbicide application. We spot-spray directly onto the rosettes, right when they’re most susceptible. Cattle return to the pasture following the labeled restrictions.

No soil compaction. No widened gates. No ATV tracks through your fescue stand. Probably also less cussing.

Hay Meadows and Alfalfa: Similar Issues

Musk thistle gets the attention because it carries a legal obligation, but the hay ground and alfalfa fields of northeast Kansas carry their own challenges that I may be able to address:

• Hay field applications for broadleaf weed control. These fields have the same access problem as pastureland. A hay meadow that’s too wet for a ground rig in early spring may allow dock, ironweed, and thistles to gain a foothold. A drone flight targeting broadleaf pressure before first cutting, while the stand is still short and conditions on the ground remain marginal, can significantly reduce weed competition without waiting for field conditions that may never fully arrive in a wet spring.

• Alfalfa stand mapping. Drone scouting can show where a stand is thinning before it becomes a replant decision. Thin areas in alfalfa often don’t announce themselves from the cab until they’re well established. From 100 feet up, the contrast in canopy density is visible and mappable. Knowing where those areas are, and whether they’re growing or stable, may change how you manage inputs and when you make a replant call.

• Drone scouting for Alfalfa weevil. Alfalfa weevil pressure in northeast Kansas typically peaks in late April through May, when the stands are hardest to walk and your decisions about first cutting are being made. A multispectral pass over a large alfalfa field can identify stressed areas and uneven stand density that walking the field simply can’t match. Couple that with your own binocular assessment, or live drone flight, from the top of my trailer and you can make decent assessment about cutting and treatment without guesswork.

• Cover crop seeding into standing hay. Many farmers are interested in cover crop seeding from a drone. Producers who want to overseed legumes into established hay stands, to improve forage quality and nitrogen fixation without the disruption of tillage or drilling, can accomplish that with the seeding capability of a Revolution Drones machine. I can spread the seed at the right point in the growing season regardless of how wet the field is. No compaction, no stand damage, no equipment that requires removing the crop first.

CRP Ground and Conservation Plans

Conservation Reserve Program ground in Brown County, Doniphan, Nemaha, and Atchison counties are sometimes troubled by woody encroachment — eastern red cedar, hedge, and multiflora rose working in from the draws year by year. If these are NOT part of your conservation plan, or if you run afoul of the 5% canopy rule, you may want to consider removing these plants. The I-19 can treat the invaders with drone-applied herbicide without disturbing the grass stand or triggering the compliance concerns that come with walking heavy equipment into enrolled acreage.

Using Drones can reduce your tax!

A reminder that section 41 of the TAX code allows some of the cost of R&D activities to turn into a TAX Credit. Testing new techniques is encouraged by the Government, and use of drones or hiring a drone service is an allowable activity.

The Operator Difference

Many aerial herbicide application services available in northeast Kansas are optimized for flat, open-field row crop work measured in thousands of acres. 20 acres of pasture or a 40-acre hay meadow with a thistle problem or an alfalfa field that needs weevil scouting before a cutting decision, isn’t their business model.

But it is Mine. I live to help farmers. Let me help you.

Stay in touch!

The post Working NE Kansas Pasture, Hay, and Alfalfa appeared first on Kansas Agricultural Drone Services, llc (KADS).

Key Takeaways

• NE Kansas spring fungicide timing is critical, especially during the Feekes 10.5 stage when heads emerge.
• Stripe rust and Fusarium head blight are significant threats; timely fungicide applications can prevent yield loss.
• Drone applications offer speed, precision, and access, allowing growers to meet the narrow treatment window effectively.
• Scout fields to confirm heading stage, disease presence, weather conditions, and field boundaries before scheduling applications.
• A timely fungicide application can significantly increase net returns in NE Kansas wheat by preventing disease pressure.

May is the time: Walk a Northeast Kansas what field and you’ll spot heads pushing out of the boot, awns just beginning to emerge, and acres upon acres of winter wheat poised at a critical growth stage. For Kansas wheat producers May holds the opening of the most important and most time-sensitive spray window of the entire growing season.

The NE Kansas spring fungicide window is open.

From Brown County south through Doniphan, Nemaha, and Marshall counties, wheat fields typically enter Feekes 10.5 in May. Once the heads begin to emerge, growers have a narrow 7 to10 day opportunity to maximize treatment. Miss it, and disease pressure — particularly Fusarium head blight and stripe rust — can erase a significant portion of yield and quality before harvest ever arrives.

Why Fungicide Timing Is the Most Important Decision You’ll Make This Spring

Ask any Kansas State University Extension agronomist and they’ll give you the same answer: fungicide timing matters more than product selection. A well-timed application of a mid-grade product will consistently outperform an expensive premium fungicide applied a week too late. This holds true every season, and it is especially true in a spring like this one, where disease conditions across Northeast Kansas have been building since April.

For NE Kansas winter wheat, the target application window is Feekes 10.5.1 when 50% or more of heads have fully emerged from the flag leaf sheath and anthers are visible. Don’t wait for Feekes 10.5.3, when flowering is roughly 50% complete. This window typically spans 5 to 7 days for any individual field, though field-to-field variation across a farm operation can extend the overall window a few days.

Fields at lower elevations or with southern exposure will head slightly earlier. A 500-acre wheat operation in Nemaha County, for example, might have fields ranging from Feekes 10.3 to Feekes 10.5.1 simultaneously — which is precisely why the flexibility of drone application provides a planning advantage over other methods.

Stripe Rust and Scab: The Two Diseases Driving Kansas Fungicide Decisions This Season

Stripe Rust Pressure in Northeast Kansas

Stripe rust (Puccinia striiformis) has been one of the most economically damaging foliar diseases in Kansas winter wheat over the past decade. The disease thrives in cool, moist conditions, which is the typical weather that dominates Northeast Kansas through April and into early May. When stripe rust is active in the lower canopy before heading, growers must act before the disease advances into the flag and flag-1 leaves, which together provide the the majority of photosynthate that fills the grain.

If you are walking your NE Kansas fields this week and seeing yellow-orange pustules on lower or mid-canopy leaves, the economic threshold has very likely already been reached. A triazole-based fungicide or a strobilurin-triazole premix applied at heading will arrest disease progress and protect the flag leaf through the critical grain fill period.

Fusarium Head Scab: The Timing-Sensitive Threat

Fusarium head blight — commonly called scab — is the most economically damaging wheat disease in years with wet, humid conditions during flowering. Unlike stripe rust, scab infection occurs specifically during anthesis, when wheat is actively flowering and anthers are exposed. This biology is why fungicide timing is so unforgiving: applications made before anthesis begins or more than six days after flowering provides significantly reduced efficacy against scab infection.

The Wheat Scab Risk Assessment Tool, maintained by the U.S. Wheat & Barley Scab Initiative, has indicated moderate-to-high infection risk for flowering-period scab in parts of North East Kansas this spring, based on recent precipitation and relative humidity data. When scab risk is elevated, hitting the Feekes 10.5.1 window precisely becomes the difference between a worthwhile Kansas fungicide investment and an application that does little to protect your crop.

The Drone Advantage for NE Kansas Spring Fungicide Applications

This is where drone application fundamentally changes what is possible for Kansas wheat producers — and it is why growers across North East Kansas are booking drone applications earlier each season rather than waiting to see if ground equipment can get in.

Speed, at the Moment Speed Is Everything

A ground sprayer covering 80–120 acres per day, accounting for boom setup, field access logistics, and soil condition limitations, simply cannot match the pace of a commercial drone operation during a narrow 7-day heading window. Kansas Ag Drone Solutions operates multi-drone fleets capable of covering 300–500+ acres per day under optimal field conditions. When your fungicide timing window opens Tuesday morning and closes Sunday evening, that speed differential determines whether your application is timely or too late.

No Compaction, No Wheel Track Damage

May in Northeast Kansas can be wet. Ground rigs navigating wet soils during heading leave ruts that damage crown root systems and reduce yield in wheel tracks for the rest of the season. Drone application eliminates compaction risk entirely — a meaningful consideration after a spring with above-normal soil moisture across much of Brown, Doniphan, and Nemaha counties.

Canopy Penetration Where It Counts

Modern agricultural drones do not simply spray from above. Downwash from their rotors actively pushes spray solution down into the crop canopy. For Kansas fungicide applications targeting Fusarium scab, where coverage of the wheat head itself is critical, rotor downwash has been shown in university application studies to achieve canopy penetration comparable to conventional aerial application — and in dense canopy conditions, superior to some ground boom configurations.

Access to Every Acre

Many NE Kansas wheat fields border drainage areas, waterways, or contain wet low spots that ground equipment cannot safely navigate. Drones operate without field access limitations. If the crop needs fungicide timing hit at Feekes 10.5.1, the drone reaches it — corner to corner, edge to waterway.

Scouting Checklist Before You Schedule Your Application

Before booking your drone application, take 15 minutes to walk several points in each field and confirm the following.

Heading stage — Are 50% or more of heads fully emerged from the flag leaf sheath? Anthers visible? You are in the window.

Stripe rust presence — Check lower and mid-canopy leaves carefully for yellow-orange pustules. Any active infection in susceptible varieties warrants immediate action.

Variety susceptibility — Cross-reference your variety against current KSU disease ratings. Susceptible varieties narrow your tolerance for any application delay.

Weather forecast — Allow at least 1–2 hours of drying time after application before any rainfall. Wind under 10 mph is optimal for drone application uniformity.

Field boundaries — Note power lines, trees, waterways, or soft spots that will affect drone flight path planning and help your operator schedule the job efficiently.

Located in or near NE Kansas?

My service area covers Brown, Doniphan, Nemaha, Marshall, Washington, and surrounding counties. Spray days get crunched as wheat heads out and rain comes in… open spots fill quickly!

Visit kads.tech to request a quote or book a flight. Same-day and next-day scheduling is available. Early morning and evening slots are open to take advantage of optimal temperature and wind conditions.

Do not let the window close. The difference between a timely and a late fungicide application in North East Kansas winter wheat can exceed 10–15 bushels per acre — at current prices, that per acre swing in net return can add up!

The Bottom Line on Kansas Fungicide Timing

NE Kansas spring fungicide applications can make a difference. Disease pressure is real, the heading window is open, and the clock is running. Fungicide timing — landing your application at Feekes 10.5 to 10.5.1 — is the single most important factor determining whether your investment produces a return.

Drone application through KADS gives you the speed, access, and canopy-level precision to execute your Kansas fungicide program within the optimal window, regardless of ground conditions or the tight scheduling demands of a whole-farm heading window compressed into one week.

The window is open. Let’s get it done.

The post NE Kansas Spring Fungicide: Timing for Winter Wheat at Heading appeared first on Kansas Agricultural Drone Services, llc (KADS).

I finally got into my own fields for pre-emergence work. Yes, drone work before anything was visibly growing! Why Fly now? In this case I am creating a series of test strips on both corn and bean fields to personally verify the efficacy of Bio S.I. Agricultural Formula by applying 8oz of product with 2 gallons of water per acre.

I am also testing the settings on my Revolution Drones I-19, tracking down leaks on my trailer plumbing, and dialing in my trailer workflow.

This is the first official outing of my I-19 on this trailer. I bought the super structure from the son of a local farmer. Friends of mine helped me to get the generator and tank placed, and then I had it wired and we all contributed to many ideas on plumbing.

The total system, including the 2007 Chevy 3500, worked great. Until I was pulling back up a hill southwest of White Cloud Kansas – The truck has just about 230,000 miles on it, 5,000 or so are mine after purchasing it from a Missouri farmer. It didn’t shift well during this outing – the upshift to 3rd was already really slow and I temporarily lost 2nd gear after several large lurches. I took it in for scheduled maintenance and the oil that came out when they were preparing to install a new shift solenoid, was bright and sparkly! So… I’ll soon have a new (to me) transmission soon. Newish is good, right?

The I-19 worked super well for this kind of pre-emergence work. The Kansas spring wind grew, and I kept flying longer than I should have because this drone was so responsive despite gusty wind. The spray pattern was impacted at some points, but the drone was rock solid. The radar kept it at my selected height over the ground, it sprayed cleanly and laid down a blanket-like pattern, and it was fast and intuitive for both automated missions and hand-flying – I even flew a few funnels!

Each pair of test strips consists of two 100′ wide strips joined together at one end by a 20′ or 30′ wide strip, to make an oddly shaped U. This footage captures the drone doing a little dance bouncing between the boundaries of the connecting strip and proceeding onto the next leg of the U. Notice how it created efficiency by limiting direction change of drone at the last transition.

Using test strip to study the impact of this type of pre-emergence application is really interesting. I will monitor the test strips throughout the season and will also continue to fly this pattern and test drone settings to smooth things out and create more efficiency. Stay tuned!

The post Pre-Emergence Soil Inoculation with Revolution Drones I-19 appeared first on Kansas Agricultural Drone Services, llc (KADS).

Key Takeaways

• The planting season brings unpredictable weather, but there are valuable opportunities for Drone Work Before Planting.
• Drones excel at pre-plant applications like burndown herbicides, pre-plant fertilizers, and pest treatments without damaging wet soils.
• Using drones for targeted applications saves money and ensures inputs reach the most deficient areas of the field.
• Scouting fields with drones can reveal critical information about drainage issues, winter damage, and soil conditions before planting.
• Planning drone flights during calm, early morning conditions enhances application accuracy and effectiveness.

Planting season has arrived. One week we are watching the forecast and waiting for soils to warm, and the next we’re running flat out trying to get everything in the ground before the weather window closes. And the 2026 weather has been crazy! In Northeast Kansas we had -12 degrees to 98 degrees in five days, and then back to the 30’s, and then back to the 60’s. Ugh. What can we do to distract ourselves? Can we pursue drone work before planting to get ahead of things? What is there to do?

There is a lot.

Many of us may think of our agricultural spray drone as an in-season tool, something pulled out when a fungicide application is due or a pest pressure flares up mid-summer. And it’s great for that. However, the pre-plant window offers a surprising number of high-value opportunities that can set up our fields for a better season before a single seed is planted. This article goes over how I think about it.

Start with Burndowns and Cover Crop Termination

If there’s one application that pays the biggest dividends in late March is burndown herbicide work. Whether you’re managing winter cover crops or just dealing with existing weed pressure that got ahead of you, terminating that vegetation cleanly before planting is critical — and the drone is a genuinely better tool for this job than you might expect.

The obvious advantage is compaction. Spring soils are often too wet to support ground equipment safely, but they’re no obstacle at all for a drone. You can fly fields that a tractor or sprayer would tear up, getting your chemistry down on time without sacrificing soil structure or creating ruts you’ll be dealing with all season. There’s also a precision advantage — you’re putting product exactly where it needs to go, at the right rate, without the overlap and waste that can come from ground rigs working irregular field shapes.

The timing of cover crop termination matters. Terminate too early and you lose soil protection; too late and that cover crop becomes competition for your cash crop or complicates planting. A drone gives you the flexibility to hit that window precisely, even when field conditions are marginal.

Pre-Plant Fertilizer and Variable Rate Applications

If you’ve done fall soil sampling now is a good time to act on what that data is telling you. Liquid fertilizer, micronutrient, and biologic applications can be made before planting based on prescription maps built from your soil test results, and this is one of the areas where drone application really distinguishes itself.

Rather than making blanket applications across the whole field, you can target deficient zones specifically. Low-pH areas get lime suspension. Iron-deficient patches get chelated iron. Zinc-deficient ground gets zinc. You’re putting inputs where they’re needed and holding back where they’re not, saving money and avoiding the yield drag that comes from over-applying in areas that don’t need it.

Variable rate application requires a little more planning: You need prescription maps built from your sampling, but for farmers who already have that data in hand, the drone is an excellent tool for executing those prescriptions quickly and accurately. If you’re not already doing grid or zone soil sampling, this is a good reason to start.

Get Ahead of Pest and Disease Pressure

One of the most underappreciated pre-plant strategies is using this window to address known pest and disease problems before they can take root with your new crop. If you have fields with a history of soil-borne disease such as Pythium, Rhizoctonia, or similar, a pre-plant fungicide application can reduce the inoculum load in the soil before your seedlings are even vulnerable. It’s much easier to manage these problems before the crop is there than to respond reactively mid-season.

The same logic applies to soil insects. Fields with documented wireworm or grub pressure are candidates for pre-plant insecticide treatment. Nematodes are another example. If you’ve had confirmed nematode pressure in a field, a nematicide application before planting gives you a head start on protection that in-furrow treatments alone may not fully cover.

None of these applications are universally necessary, and I’m not suggesting you spray everything “just in case.” But if your field history tells you there’s a problem, the pre-plant window is when to address it. The drone makes it economical to treat specific areas of a field rather than the whole thing, which matters when you’re talking about products that can carry a real cost per acre.

Scout Your Fields Before You Commit to a Plan

I believe in proactive crop scouting. Consider using your pre-season flight time to scout. Many spray drones are equipped with cameras capable of capturing meaningful field imagery. There are also dedicated options that include useful multispectral cameras that can produce a wealth of information about field conditions. Flying fields before planting can tell you a lot about what you’re working with.

After a rain event, a flight over your fields will reveal ponding patterns, low spots, areas where drainage is failing, and places where compaction is holding water. That information is actionable! You can address tile line failures, make decisions about where to prioritize tillage, or adjust your planting plan to account for problem areas rather than discovering them after the fact. Spotting a drainage problem in late March is far better than watching a low spot drown out a stand in May.

Early season flights can also reveal winter damage to perennial crops, erosion from freeze-thaw cycles, or residue distribution problems that could affect planting uniformity.

Practical Notes for Spring Flying in Kansas

Pre-plant work in late March and early April comes with some operational reality’s worth keeping in mind. Wind is always the primary enemy of accurate spray application, and spring in northeast Kansas is not known for calm conditions. Early morning flights — before the wind picks up — are almost always your best window for quality applications. Plan your days accordingly.

Temperature and soil conditions may also matter based on the product you’re applying. Pre-emergent herbicides or biologics often require soil temperatures in a specific range to activate correctly, so coordinate your application timing with soil temp data rather than just calendar date. And if you’re applying anything that needs to be incorporated by rain, keep an eye on the forecast so you’re not waiting weeks for activation.

Finally, if you’re flying burndown applications near field edges or shelter belts, take the time to map your boundaries carefully before you fly, and use strategically plan your flight in relation to the wind.

The pre-plant window is short, and there’s always competition for your time and attention. But a spray drone gives you a tool that can keep working even when field conditions say the tractor stays parked. Used well, these early applications can meaningfully improve the foundation you’re planting into — and that’s a head start you’ll notice come harvest.

If you have questions about pre-plant applications or want to talk through what might make sense for your operation, reach out. That’s what I’m here for.

The post Why Fly? Drone Work Before Planting appeared first on Kansas Agricultural Drone Services, llc (KADS).

Three years in a row now. That’s how long phyllachora maydis, Tar Spot, has been showing up in corn near me. It seems to arrive a little earlier and spread a little further each year. If you’re farming in Brown, Doniphan, Atchison, Jackson, or Nemaha County, or just across the line in Richardson County, Nebraska, or Andrew and Holt County in Missouri, this disease is already in your neighborhood, spores waiting quietly in your ground and in your crop debris. The question isn’t whether it will show up. The question is whether you’ll catch it in time to do something about tar spot in northeast Kansas.

My family has bottom ground along the Missouri River in Doniphan County, KS. My fields sit in exactly the kind of environment tar spot loves — cooler nights, dew, and evening humidity. I have a personal stake in this topic and spent much of the 2025 growing season worrying about how to identify tar spot with my scouting drone. I was lucky because none of the fields I was watching were impacted.

I wanted to know more about how we should deal with tar spot in northeast Kansas and so fired up the computer to find out. Here’s what I found and maybe what it means for our future growing seasons.

Three Years of Confirmed Cases in Northeast Kansas

This isn’t a disease that shows up once and goes away. K-State Research and Extension has documented confirmed tar spot cases in northeast Kansas in 2023, 2024, and 2025. Here’s the county-by-county picture:

2023 NE Kansas Confirmed Cases:

• Doniphan County — June 26
• Atchison County — June 30
• Jefferson County — June 30
• Brown County — July 5
• Nemaha County — July 28
• Jackson County — August 8
• Marshall County — August 22

K-State reported that 2023 severity was much higher than 2022, with severe yield impact in several northeast Kansas fields. ^[1]

2024 NE Kansas Confirmed Cases:

• Doniphan County — May 27
• Atchison County — June 4
• Jefferson County — June 14
• Nemaha County — June 18
• Brown County — July 8

K-State noted that the early onset in 2024 raised serious concern for yield loss. Generally, earlier detection corresponds to higher yield loss. [1]

2025 NE Kansas Confirmed Cases:

• Doniphan County — June 11
• Brown County — June 17
• Jefferson County — June 23
• Atchison County — July 2
• Republic County — July 7
• Marshall County — July 9

The trend seems clear: tar spot is being identified earlier in a wider area each year. Doniphan County has been first in Kansas all three years running. Unfortunately, farms far away from the bottoms are being impacted!

It Doesn’t Stop at the State Line

If you’re watching the Kansas map and thinking you’re safe because your county hasn’t shown up yet, look at what’s happening just across the river.

Nebraska:

Richardson County sits directly north of Brown and Doniphan counties. UNL Extension has confirmed tar spot in Richardson County, and Nebraska plant pathologist Tamra Jackson-Ziems noted in early 2025 that the hot zone for tar spot in Nebraska is in the eastern most state counties. That includes Richardson County. She also notes that tar spot has been confirmed as far west as Brown County, Nebraska. ^[2]

Missouri:

Andrew County, Missouri, bordering Doniphan County, was confirmed with tar spot in 2024 per MU Extension and Corn ipmPIPE. Holt County, also on our doorstep in northwest Missouri, was one of the first confirmed cases in Missouri in June 2023 — the earliest the disease had ever appeared in that state at that time. ^[3]

MU Extension plant pathologist Mandy Bish confirmed tar spot in 19 Missouri counties in 2024, and noted that the disease is expected to continue spreading in 2025. She also confirmed that tar spot has been showing up in Missouri in June — far earlier than the August and September appearances seen in previous years. ^[4]

The picture is forming for me: northeast Kansas is surrounded on multiple sides by confirmed tar spot pressure. Spores move by wind and rain. There is no fence between your field and the next that can stop the spores.

River Bottoms Are Ground Zero

Tar spot thrives in specific conditions. Research has shown it favors mean daily temperatures in the mid-60s to low 70s, relative humidity above 75%, and extended periods of leaf wetness — at least seven hours is enough to get it going. ^[5]

If you farm the Missouri River bottoms in Doniphan County, or in any of the bordering counties, you know exactly how the river can impact farming. For good and bad. The bottom ground holds moisture. Dew can be heavy and can remain on the leaves well into the morning. Nights are cooler than the upland ground because cold air sinks. Fog is common.

There’s a reason Doniphan County has led Kansas in early tar spot detection all three years running. I guess the geography works against us. That same rich, productive bottom ground that grows heavy corn is also the most favorable environment in the region for this disease.

UNL’s Jackson-Ziems also noted that irrigated fields were particularly hard hit in Nebraska, overhead irrigation adds the leaf wetness that tar spot needs to develop and spread. If you’re running pivots on bottom ground, you may be running the highest-risk acres in your operation. ^[2]

What It Can Cost Us

The Crop Protection Network has documented yield losses ranging from zero to more than 50 bushels per acre, depending on hybrid susceptibility, timing of infection, and weather conditions. In experimental plots, losses of 20 to 40 bushels per acre were recorded when 50% of the ear leaf was covered in tar spot lesions at dent stage. ^[5]

Nationally, the Crop Protection Network estimated that tar spot claimed roughly 293 million bushels across the U.S. in 2024 alone. ^[6] That is real-world impact. It is what happens when the spores get into fields at the wrong time with the wrong hybrid and no fungicide in the window.

K-State was direct about it in their 2024 alert: early onset of tar spot has generally corresponded with higher yield loss. When Doniphan County showed a confirmed case on May 27, 2024, one of the earliest confirmed cases in Kansas history, that was a warning flag for the whole northeast corner of the state. ^[1]

What a Drone Sees That You Can’t

The challenge with tar spot is we cannot see it until it has already developed a hold on the field. It may be lurking too deep in the canopy for easy scouting. The disease starts in the lower and middle canopy, where it is tough to see when corn is tall and thick. Worse, it can move fast with ideal conditions.

A multispectral drone camera picks up plant stress before it’s visible to the eye. Infected plants start to change the way they reflect light, specifically in the near-infrared spectrum, before the damage is obvious from the ground. An NDVI map produced after a flight will show those stressed zones as different colors compared to healthy areas of the field.

This map tells us exactly where we need to foot-scout to personally check on conditions. It can save us from walking the full 160-acre field in summer heat and humidity! Simply walk straight to those zones and confirm what you’re seeing.

MU Extension has specifically noted that tar spot tends to stay in the lower canopy in its early stages, exactly where it’s hardest to spot on foot and where drone-assisted scouting pays off most. ^[4]

When to Scout and When to Act

Research all seems to point to the same fungicide window: VT through R3. Fungicide applications made just after first detection and at or after VT have shown the most consistent results in research. Fungicide applications after R5 show no yield benefit. ^{[1, 3, 4]}

Given that Doniphan County has seen confirmed tar spot as early as late May, and that the disease tends to build in the lower canopy before it becomes obvious, a scouting flight in late June through early July on your highest-risk ground is a sound practice. That’s your bottom ground, your irrigated acres, your corn-on-corn fields, and any field that took a hit in 2023 or 2024.

Using Drones can reduce your tax!

Section 41 of the TAX code allows some of the cost R&D activities to turn into a TAX Credit. Testing new techniques is encouraged by the Government, and use of drones or hiring a drone service is an allowable activity.

Parting Thoughts

Three years of data, confirmed in our own counties, with the disease arriving earlier every season. That’s not a trend you can wait out.

My farm is in the bottoms. I understand the risk personally. The combination of our geography, our humidity, our heavy dew, and the fact that tar spot overwinters in corn residue, meaning last year’s infected fields are this year’s starting point, makes northeast Kansas some of the highest-risk ground in the state.

Taking care of your fields, ensuring tar spot doesn’t take hold, helps your neighbor take care of their fields. We all share responsibility for these kinds of pressure. Getting eyes in the air early, before tar spot gets established in the canopy, is the difference between catching it in time and watching yield decrease.

Let’s work together! Connect with me if you want to discuss scouting your fields.

Further Reading

[1] Onofre, R. “Tar Spot is Active in Five Counties in Northeast Kansas.” K-State Research and Extension eUpdate. 2024. https://eupdate.agronomy.ksu.edu/article/tar-spot-is-active-in-five-counties-in-northeast-kansas-599-4

[2] Jackson-Ziems, T. “Add Southern Rust to Your Watch List.” Nebraska Farmer / UNL Extension. March 2025. https://digitaledition.qwinc.com/publication/?i=843779&article_id=4955829

[3] Bish, M. “Tar Spot of Corn Confirmed in June in Missouri — the Earliest Ever.” MU Extension / ipm.missouri.edu. June 2023. https://ipm.missouri.edu/croppest/2023/6/tarSpot-MB/

[4] Bish, M. “Tar Spot Growing in Missouri Corn Crops.” MU Extension. July 2024. https://extension.missouri.edu/news/tar-spot-growing-in-missouri-corn-crops

[5] Crop Protection Network. “Tar Spot of Corn Web Book.” https://cropprotectionnetwork.org/web-books/tar-spot-of-corn

[6] AgWeb / Crop Protection Network. “Tar Spot of Corn: A Growing Threat to U.S. Yields.” May 2025. https://www.agweb.com/news/crops/tar-spot-corn-threat

The post Corn and Tar Spot in Northeast Kansas appeared first on Kansas Agricultural Drone Services, llc (KADS).

Key Takeaways

• Weather significantly affects agricultural spraying; it dictates when to plant and spray.
• Spray drones excel in adverse weather, flying when ground rigs cannot, reducing soil compaction and crop damage.
• Understanding wind, heat, humidity, and rain is crucial to avoid common drone mistakes during spraying.
• Operators should plan ahead and monitor conditions to optimize the spray drone weather window and ensure successful applications.
• Smart management of spray drones allows timely interventions, preventing costly mistakes linked to changing weather conditions.

Weather controls everything in farming. Weather decides when you plant, when you spray, and whether you hit the timing window or miss it completely. Spray windows are tight, and they seem to shrink every year. Rain hits fast, wind shows up early, and heat builds when you least want it.

This is where an agricultural spray drone becomes a powerful tool. Drones don’t replace every sprayer on the farm, but they absolutely win when the weather is working against you. They fly when rigs can’t, they reach tall crops without damage, and they help you hit timing windows that used to be impossible.

But weather is also the #1 cause of drone mistakes. Drone fails happen when operators rush or ignore conditions. Drift, poor coverage, battery strain, or uneven spray are likely if you work outside the ideal application window.

This guide explains how weather affects drone spraying and how to use each spray drone weather window to your advantage.

Spray Drones Work with Wet Fields

No Ruts

Applying with ground rigs following a good rain can leave ruts. Sometimes deep ones. Those ruts are campaction. They damage soil structure and can create headaches for years. A drone doesn’t touch the ground. It doesn’t matter if the field is soft, tacky, or still holding water in the low spots.

Spraying with a drone: No compaction. No ruts. No waiting for the top inch to dry.

Faster Access

A drone can be in the air minutes after a storm passes. A ground rig might need a day or two. That difference can make or break a fungicide window or an insecticide rescue pass.

When the field is too wet for wheels, a drone is often the only tool that can get the job done.

Fewer Ground‑Rig Fails

Most “weather fails” in spraying come from trying to push a ground rig into a field that isn’t ready. You get stuck, you leave tracks, or you damage the crop.

A drone avoids all of that. It’s not just faster — it’s safer for the field.

Spray Drones and Wind Limits

Low Flight Helps

Spray drones fly low — usually 8 to 12 feet above the canopy. That low height reduces drift because droplets have less time to move sideways before hitting the crop.

This is a major drone safety advantage over airplanes and even some high‑clearance rigs.

Common Wind Mistakes

Wind‑related drone fails often come from:

• Flying in steady wind over 10 mph, or gusts over 15 mph
• Flying with a tailwind that pushes droplets off target
• Ignoring crosswinds that shift mid‑flight
• Using too fine a droplet size on a breezy day
• Flying too high, increasing drift distance
• Not adjusting flight direction to match wind

These are all preventable with a little awareness.

Heat & Humidity Impact on Spray Drones

Evaporation Risk

Fine droplets evaporate fast in hot, dry weather. If you spray at 2 p.m. on a 95° day with low humidity, you’re losing product before it ever hits the leaf.

This is one of the easiest drone mistakes to avoid:
Don’t spray in the heat of the day unless you absolutely have to.

Humidity Helps Coverage

Higher humidity slows evaporation. Early morning and late evening often give you the best mix of:

• Cooler temps
• Higher humidity
• Lower wind

These conditions help droplets stay intact and improve coverage.

Avoiding Heat‑Related Drone Mistakes

To avoid heat‑related drone fails, follow these simple rules:

• Spray early or late – away from the high noon sun.
• Use medium droplets in hot weather
• Avoid mid‑day flights when possible
• Watch for temperature inversions (evening)

Heat changes everything — droplet size, drift, and coverage.

Spray Drones and Timing Rain

Post‑Rain Advantage

As mentioned above, ground rigs can’t enter the field. But a drone can. This is where drones earn their keep.

Post‑rain spraying is especially important for:

• Fungicide timing
• Insect outbreaks
• Late‑season passes
• Pasture and hayfield rescue jobs

A drone lets you hit the window instead of missing it. And avoid compaction!

Rescue Passes

Sometimes you don’t get a second chance. Corn fungicide windows are tight. Soybean insect pressure can explode overnight. If you miss the timing, you lose yield.

A drone gives you the ability to respond fast — even when the field is still too wet for anything else.

Rain‑Related Drone Fails

Rain‑related drone mistakes include:

• Flying in light drizzle (bad for electronics)
• Flying too soon after heavy rain (visibility issues)
• Launching from muddy ground (slip risk)
• Letting batteries get wet

Rain helps drones access fields — but only if you respect the limits.

Crop Height

Tall Crop Access

Once corn hits tassel height, most rigs can’t get in without breaking stalks. Drones don’t care. They fly above the canopy and never touch the crop.

This is a huge advantage for:

• VT fungicide
• Late‑season insecticide
• Specialty crops
• Seed corn

Reduced Crop Damage

Every tramline is lost yield. Every broken stalk is lost yield. Drones eliminate that damage completely.

Height‑Related Drone Safety Tips

Tall crops create new challenges:

• Prop‑wash can push leaves around (but this is also a benefit)
• Obstacles like pivot towers become harder to see (pre-map them)
• Flight altitude must be consistent

These aren’t drone fails — they’re operator awareness issues.

Drift Control

Weather + Droplet Size

Drift isn’t just about wind. It’s about:

• Temperature
• Humidity
• Droplet size
• Flight height
• Airflow

Drones give you more control over droplet size than most rigs, but you still need to match the weather. For instance, it may be tempting to fly in a fog, but there is no droplet setting that will overcome the diluation!

Avoiding Drift Mistakes

The biggest drift‑related drone mistakes are:

• Flying too high
• Using fine droplets on windy days
• Ignoring temperature inversions
• Spraying during rapid wind shifts

These are easy to avoid with a little planning. Check your weather apps and put eyes on the field to confirm you can fly safely that day.

Safe Spray Windows

A simple rule:

• If the trees are moving, check the wind.
• If the leaves are flipping, don’t spray.

Operator Tips for Spray Drones

Watch the Trees

Trees tell the truth about wind. If the tops are moving, the wind is stronger than your weather app says.

Use Short Missions

Shorter missions give you more control when weather is changing. Set down when that rain cloud is a mile away. Pick back up after it passes!

Avoid Rushing

Most drone fails happen when someone is trying to beat the weather by rushing. Slow down. Think. Fly safe.

Final Thoughts

Weather windows are where spray drones earn their keep. They let you spray when rigs can’t, they help you hit tight timing windows, and they reduce the risk of crop damage and soil compaction.

But weather can also cause drone mistakes if you don’t respect it. Wind, heat, humidity, and rain all change how droplets behave and how the drone performs.

A smart operator watches the weather, plans ahead, and flies with intention. That’s how you get the best results — and avoid the costly drone fails that come from rushing or guessing.

The post Spray Drone Weather Window appeared first on Kansas Agricultural Drone Services, llc (KADS).

Key Takeaways

• Soil compaction quietly impacts yields, fuel efficiency, and overall soil health, often worsened by modern heavy equipment.
• Spray drones help reduce soil compaction by applying crop protection without touching the soil, preventing new compaction.
• Using biological products like Bio S.I. Agriculture or SB 25 can rebuild soil structure and improve infiltration and root growth.
• A practical strategy combines using drones for applications in wet fields and applying biologicals for rebuilding damaged areas.
• Monitoring improvements with drone imagery helps track soil health and productivity over time.

Soil compaction is one of those problems every farmer knows is out there, but it’s easy to underestimate just how much it steals from your bottom line. You don’t see compaction the way you see weeds or disease. You don’t get a text alert when your subsoil hits 300 PSI. But year after year, compaction quietly chips away at yield, fuel efficiency, soil health, and water infiltration.

And here’s the kicker: modern farms are running heavier equipment than ever. Bigger sprayers, bigger planters, bigger grain carts. Great for efficiency—terrible for soil structure.

But there’s good news. New tools like spray drones, along with biological soil products like Bio S.I. Agriculture, are giving farmers real ways to reduce compaction and even reverse some of the damage already done.

I’ll dig into what’s happening under the surface and how drones help keep fields lighter, healthier, and more productive.

What Exactly Is Field Compaction?

Soil compaction happens when soil particles get pressed together so tightly that the pore space—the little pockets that hold air and water—collapses. When that structure collapses, roots struggle, water can’t move, and biology suffocates.

The main causes of farm compaction:

• Heavy equipment (sprayers, tractors, grain carts)
• Repeated passes in the same wheel tracks
• Working ground when it’s too wet
• Livestock traffic
• Natural settling in low-organic-matter soils

The symptoms farmers see:

• Stunted or uneven crop growth
• Ponding or slow infiltration
• Sidewall smearing during planting
• Roots growing sideways instead of down
• Lower yields in “problem zones” year after year

The hidden costs:

• Reduced nitrogen efficiency
• More runoff and erosion
• Higher fuel use for tillage
• Delayed field access after rain
• Lower drought resilience

Compaction isn’t just a nuisance—it’s a structural soil problem that affects every part of the crop’s life cycle.

Why Modern Equipment Makes Compaction Worse

Today’s sprayers can weigh 30,000–40,000 pounds loaded. Planters with fertilizer tanks can push 20,000+ pounds. Grain carts? 40,000–60,000 pounds is common.

Even with flotation tires or tracks, the sheer weight creates deep compaction layers—often 6–18 inches down—where roots need to grow.

And here’s the part most farmers don’t love to hear: Most compaction happens on the first pass. Once a wheel track is formed, every additional pass just makes it worse.

That’s why reducing passes—not just reducing weight—is the real key.

This is a field I am monitoring. Three generations have farmed it and used similar practices. The equipment has evolved over time, to try and reduce PSI with treads, wide tires, etc. Much of the soil compaction is worn in so deeply nothing grows there. Worse, there are several additional tracks that are just now starting to emerge as problem areas.

How Spray Drones Help Reduce Field Compaction

Spray drones are more than just cool new gadgets. They are also a fundamentally different way to apply crop protection, biologicals, and foliar nutrients without ever touching the soil.

Here’s how drones help farmers avoid compaction:

1⃣ Zero Ground Pressure — Literally No Compaction

A drone never touches the field. No ruts. No wheel tracks. No PSI on the soil surface.

This is especially valuable:

• After heavy rains
• In low spots
• On headlands already beaten down by equipment
• In no‑till systems where soil structure is everything

When a drone flies the application, the soil stays intact.

2⃣ Timely Applications When Ground Rigs Can’t Run

Every farmer knows the frustration of watching disease spread or weeds bolt while the sprayer sits because the field is too wet.

Drones don’t care. They can fly:

• The day after a rain
• In muddy fields
• Over standing water
• In areas where a ground rig would get stuck

As long as we can get our drone tender near the field, we will fly!

Timely application = better control and higher yield potential.

3⃣ No Headland Beating

Headlands are the first place compaction shows up. Ground rigs turn, brake, accelerate, and overlap there.

Drones?
They take off from the field edge and never touch the crop zone.

Your headlands stay healthier, and yield maps show it.

4⃣ Precision Spot Spraying Reduces Passes

With drone mapping and NDVI imagery, you can treat only the acres that need it.

Instead of running a 120‑foot boom across the whole field, a drone can:

• Hit only the drowned-out patches
• Treat only the disease pockets
• Spray only the weed escapes

Fewer ground passes = less compaction.

5⃣ Perfect for Small Fields, Terraces, and Odd Shapes

Ground rigs struggle in:

• Terraced fields
• Narrow waterways
• Small patches
• Timber edges
• Pivot corners

Drones thrive in these environments, eliminating the need for extra turns and extra wheel traffic.

Biological inoculants May Help

Avoiding compaction is ideal—but most farms already have compacted layers from years of heavy equipment.

That’s where biological soil products come in.

Bio S.I. Agriculture offers microbial products designed to rebuild soil structure by increasing biological activity, improving aggregation, and helping organic matter break down more effectively.

Here’s how they help with compaction:

1. Microbes Rebuild Soil Structure

Healthy soil biology creates glues and polysaccharides that bind soil particles into stable aggregates. Aggregates = pore space = better infiltration and root growth.

Bio S.I. products introduce and stimulate beneficial microbes that help rebuild this structure.

2. Improved Water Infiltration

Compacted soils shed water. Biologically active soils absorb it.

Bio S.I. Agriculture products help:

• Increase infiltration
• Reduce ponding
• Improve water-holding capacity
• Reduce runoff

This is especially important in no‑till systems where natural structure is the backbone of the system.

3. Stronger Root Systems Break Through Compaction

Microbial activity helps roots grow deeper and more aggressively.
Roots are nature’s subsoiler.

The more roots you have, the more channels you create for:

• Air
• Water
• Nutrients
• Microbial movement

Bio S.I. products support this natural process.

4. Faster Breakdown of Residue

Residue breakdown is essential for building organic matter and improving soil tilth.

Bio S.I. SB 25 accelerate residue decomposition, which:

• Reduces surface crusting
• Improves seed-to-soil contact
• Builds long-term soil structure

Better structure = less compaction over time.

A Practical Strategy: Combine Drones + Biology

Here’s a simple, effective approach many growers are adopting:

Step 1: Use drones for all wet-field or sensitive-field applications.

This prevents new soil compaction and protects soil structure.

Step 2: Apply biologicals like to rebuild damaged areas.

Especially:

• Headlands
• Low spots
• High-traffic zones
• Areas with poor infiltration

Step 3: Use drone mapping to identify compaction zones.

NDVI, NDRE, and thermal imagery reveal:

• Stunted growth
• Water stress
• Ponding
• Poor root development

These zones often correlate directly with compaction.

Step 4: Spot-treat problem areas with drones.

Instead of running a ground rig across the whole field, drones can apply:

• Biologicals
• Foliar nutrients
• Fungicides
• Micronutrients

Only where needed. And precisely WHEN needed.

Step 5: Track improvements over time.

With drone imagery, you can literally watch soil health improve:

• Better infiltration
• More uniform growth
• Stronger canopy
• Higher yield consistency

The Bottom Line: Drones Reduce Soil Compaction

Soil compaction is one of the most expensive, least visible problems in modern agriculture. It steals yield quietly and consistently. It is the diabetes of agriculture.

But drones give farmers a new way to fight back:

• No wheel tracks
• No ruts
• No PSI on the soil
• No waiting for fields to dry
• No beating up headlands
• No unnecessary passes

And when you pair drones with biological soil products like Bio S.I. Agriculture and SD 25, you’re not just avoiding soil compaction—you’re actively rebuilding soil structure for the long haul.

Healthy soil is productive soil.
And productive soil is profitable soil.

If you’re looking for a practical, modern way to protect your fields from soil compaction, or exercise them away from compaction, drones and biologicals are two of the most powerful tools you can put to work.

The post Soil Compaction: The Hidden Yield Killer appeared first on Kansas Agricultural Drone Services, llc (KADS).

Key Takeaways

• Droplet size is crucial for effective drone spraying; it affects coverage and drift significantly.
• Small droplets provide more coverage but drift more, while large droplets minimize drift at the cost of coverage.
• Different spraying jobs require different droplet sizes: fine for coverage, medium for balance, and coarse for sensitive areas.
• Most biological products benefit from medium to coarse droplets to avoid damage and ensure effectiveness.
• Controlling droplet size allows for better results in various agricultural applications; experimentation is essential.

When people talk about agricultural spray drones, they usually focus on tank size, battery life, or acres per hour. Those things matter, but they’re not the whole story. The real key to controllable drone spraying is droplet size. If you don’t get that right, nothing else works the way it should.

Allow me to break this down in plain language.

What Droplet Size Actually Is

Droplet size is the physical size of a drop of product. It is measured in microns. One micron is one‑thousandth of a millimeter. You don’t need to memorize that, just remember this:

• Small droplets = more coverage, more drift
• Big droplets = less drift, less coverage

That’s the whole game.

Drone Nozzles Work Differently Than Boom Nozzles

A ground rig pushes liquid through a nozzle using pressure.

A drone uses:

• Pressure
• Airflow from rotors
• High-speed atomization

That rotor airflow breaks droplets apart. It’s why drones can make very fine droplets even at low pressure. You have very fine control so you must match your droplet size to the job.

Coverage vs. Drift: Finding the Sweet Spot

Different jobs need different droplet sizes.

• Fine droplets
  Great for coverage. Not great for wind.
  Think: fungicides on dense canopies.
• Medium droplets
  Good balance. Most drone work fits here.
• Coarse droplets
  Less drift. Less coverage.
  Think: sensitive areas or windy days.

The trick is choosing the right size for the crop, the product, and the weather.

Biologicals and Droplet Size

Most biological products prefer medium to coarse droplets.
They don’t like being shredded into ultra‑fine mist.
They work better when they land gently and stay alive.

This is one reason drones pair so well with biologicals — you can tune droplet size to protect the product.

Real Midwest Examples

• Late‑season corn fungicide:
  Medium droplets give good canopy penetration without drifting into the neighbor’s beans.
• Soybean insecticide rescue pass:
  Fine‑medium droplets help hit the pests hiding under leaves.
• Biological foliar feed:
  Medium‑coarse droplets reduce stress on the product.

Bottom Line

Droplet size is the heart of drone spraying. If you control the droplets, you control the results. Experiment and see what works with different products, flight speed, and wind conditions.

Good luck!!

The post Droplet Size Is the Secret to Drone Application appeared first on Kansas Agricultural Drone Services, llc (KADS).

Key Takeaways

• Healthy soil life is essential for profitable agriculture, and farmers are shifting toward natural treatments like agricultural biologicals.
• Bio S.I. Technology offers microbial products that restore beneficial soil bacteria and fungi to enhance long-term soil resilience.
• AG drones provide a flexible application method for biologicals, improving soil microbiology without compaction or drift risks.
• Agricultural biologicals enhance nutrient cycling and support organic farming, leading to healthier crops and better yields over time.
• Both SD 25 and Agricultural Formula are effective biologicals that can be applied using drones for optimal soil recovery and crop growth.

Using AG Drones to Energize Beneficial Soil Bacteria

Healthy soil life is the foundation of profitable agriculture. Never without challenges, farmers face societal pressure to turn away from chemical products and return to more natural treatments. Perhaps there is good reason behind it. Microbial inoculants are the natural enhancement beyond organic fertilizers like compost, green manures, or seaweed extracts. Modern agricultural biologicals allow us to rebuild soil structure, improve nutrient cycling, and enhance microbial life for a naturally healthy field.

One provider of these microbial products, and a line I carry at KADS, is Bio S.I. Technology, a company with a vision founded in the deep roots of soil health, biodynamic agriculture, and organic fertilizer systems. Bio S.I.’s Agricultural Formula and SD 25 have become essential tools for farmers wanting to restore beneficial soil bacteria and fungi, enhance biological diversity, and improve long‑term soil resilience.

At the same time, agricultural spray drones have become the most flexible and rapid‑response application tool available to row‑crop farmers. Spray drones can apply low‑volume biologicals to improve soil microbiology exactly when the crop needs them.  Without compaction, without waiting for ground rigs, and without the drift risk of high‑pressure aerial systems.

Why Soil Biologicals Matter

Microorganisms offer a long‑term soil health advantage because they rebuild the living ecosystem beneath the surface rather than overwhelming it with synthetic inputs. Modern soils often suffer from reduced microbial diversity, compaction, and declining organic matter due to decades of man‑made chemical use. Biologicals flip that trend by reintroducing beneficial soil bacteria, bolstering the microbiome, and restoring the natural processes that make soil productive. These honest-to-gosh living microorganisms break down dead residue, unlock tied‑up nutrients, and improve soil structure in ways chemicals simply can’t replicate. As microbial life increases, soils become more resilient, better aerated, and more efficient at cycling nutrients—leading to healthier crops and stronger yields over time.

Man‑made chemicals, while effective for short‑term correction, often treat symptoms rather than addressing the underlying causes of poor soil performance. High‑salt fertilizers and harsh chemistries can disrupt microbial communities, reduce organic matter, and create long‑term soil health challenges that require even more inputs to overcome. Biologicals take the opposite approach: they enhance nutrient availability naturally, support organic fertilizer programs, and align with biodynamic agriculture principles by working with the soil’s biology instead of against it. The result is a more balanced, self‑sustaining soil system that requires fewer corrective inputs and delivers more consistent performance across variable weather and field conditions. For growers focused on long‑term soil health, biologicals provide a regenerative path forward that chemicals alone cannot match.

Biologicals are one of the highest‑ROI tools available for those farmers concerned about soil health.

Bio S.I. Technology: A History Rooted in Soil Life

Bio S.I. Technology was founded with a clear mission: Restore the microbial life that modern agriculture has lost. Their products are used successfully on:

• Corn and soybean acres across the Midwest
• Alfalfa stands needing improved root vigor
• Organic and biodynamic farms
• Conventional farms looking to reduce compaction and improve nutrient efficiency

Their biologicals are simple, consistent, and compatible with modern application tools including ground rigs and spray drones.

SD 25: Fall and Spring Applications for Soil Recovery

The Bio S.I. Technology product SD 25 is a residue‑digestion and soil‑rebuilding biological product designed to reincorporate crop residue, replenish lost microbes, and help soil recover following a successful growing season.

What SD 25 Does

• Breaks down stalks, stems, and root mass
• Releases tied‑up nutrients
• Reduces overwintering pest habitat
• Improves soil tilth and organic matter
• Supports biodynamic agriculture and organic fertilizer systems

Fall Application

Fall is the ideal time to apply SD 25. As residue begins to break down, nutrients like nitrogen, phosphorus, and sulfur become available for spring planting. Reducing crop residue also limits the habitat for overwintering pests.

Spring Application

If fall conditions were too dry or harvest ran late, SD 25 can be applied with burndown in early spring to jump‑start microbial activity and reduce early‑season compaction.

Agricultural Formula: A Pre‑Emergent Biological

Bio S.I.’s Agricultural Formula is a broad‑spectrum soil inoculant designed to be applied pre‑emergence for a strong emergence and initial growth. It introduces beneficial soil bacteria and fungi that support early root development, nutrient uptake, and overall plant vigor.

Crop‑Specific Benefits

Corn

• Stronger early root mass
• Improved nutrient uptake
• Better standability

Soybeans

• Improved nodulation
• Faster canopy development

Alfalfa

• Stronger crowns
• Improved nutrient cycling

Drone Application Guidance

Spray drones are one of the most efficient ways to apply biologicals. Ground rigs or drones are ideal to apply these products using low‑volume, high‑precision systems.

SD 25 (Residue Digester)

• Rate: 12-24 oz/acre, depending upon the amount of residue.
• Carrier Volume: 1–3 GPA
• Timing: Fall or early spring

Agricultural Formula (Pre‑Emergent Biological)

• Rate: 8-12 oz/acre for broadcast applications
• Carrier Volume: 1–3 GPA
• Timing: Pre‑plant or pre‑emergence

Both products are highly concentrated soil-derived microbial blends, making them ideal for drone application. Concentrations and volume depend upon field conditions.

Mixing Instructions for Spray Drones

1. Fill tank halfway with clean water.
2. Add product.
3. Add compatible additives (humics, fulvics, micronutrients).
4. Top off with water.
5. Gently agitate. No high‑shear mixing required.

Compatibility Notes

• Compatible with humic/fulvic acids
• Compatible with most micronutrients
• Avoid strong oxidizers or high‑salt fertilizers

Drone Application Best Practices

• Fly 8–10 feet above soil or canopy
• Use coarse droplets to reduce drift
• Maintain 20–30% overlap (Confirm your swath!)
• Apply early morning or late evening for best microbial survival
• Thoroughly rinse tanks prior to use

Biologicals That Pair Well with Bio SI

Growers often combine Bio S.I. products with:

• Humic and fulvic acids
• Mycorrhizal fungi
• Liquid organic fertilizers
• Seaweed extracts

These additions further support biodynamic agriculture and enhance microbial habitat.

Using Drones can reduce your tax!

Section 41 of the TAX code allows some of the cost R&D activities to turn into a TAX Credit. Testing new techniques is encouraged by the Government, and use of biologicals and/or the use of drones or hiring a drone service is an allowable activity.

Closing Thoughts

In the end, rebuilding soil life isn’t complicated. It is just a commitment to working with biology instead of against it. Bio S.I.’s Agricultural Formula and SD 25 give growers a practical, field‑ready way to restore beneficial soil bacteria and fungi, strengthen microbial diversity, and build long‑term soil resilience across corn, soybeans, alfalfa, and other row crops. Paired with modern drone application, these biologicals deliver real agronomic value. Healthy soil pays dividends for years, and the growers who invest in their microbial life today are the ones building stronger, more profitable acres for tomorrow.

FAQ: Agricultural Biologicals, Soil Inoculants, and Drone Application

The post Rebuilding Soil Life: Agricultural Biologicals appeared first on Kansas Agricultural Drone Services, llc (KADS).

Key Takeaways

• Agricultural spray drones are essential for modern farming, offering precise coverage and efficiency.
• Choosing the right drone depends on field size, terrain, and layout, rather than just tank size.
• Small agricultural spray drones excel in small, irregular fields and challenging terrains, providing better maneuverability.
• Large agricultural spray drones work best in expansive, open fields with fewer obstacles, optimizing for speed and volume.
• Understanding the physics behind drone performance helps farmers select the best option for their specific spraying needs.

Agricultural spray drones have moved from novelty to necessity in record time. What started as a niche tool is now a mainstream piece of farm equipment spotted across the Central Plains, proving they can deliver precise coverage, reduce soil compaction, and open up spraying windows that ground rigs simply can’t reach. The technology has matured to the point where drones aren’t just “interesting”—they’re dependable, repeatable, and increasingly central to modern crop protection strategies.

But here’s the real question all farmers should be asking: What is the best spray drone for my farm? The answer isn’t “the biggest tank” or “the newest model.”

Making a purchase decision between small vs large drones comes down to something far more practical: matching the drone to your field size, terrain, and complexity. A drone that crushes acres in a 640‑acre section may be painfully inefficient in a 40‑acre terraced field. Likewise, a nimble small drone that dances around waterways and tree lines may fall behind when you need to cover 900 acres before the wind picks up.

I will attempt in break down the real‑world differences between small vs. large spray drones, how each performs in different field conditions, and why physics plays a bigger role in drone efficiency than most people realize. Which, you know, I love that physics is involved.

Whether you’re buying your first agricultural spray drone or thinking about expanding your fleet of AG drones, this guide will help you choose the right tool for your acres.

Choosing the Right Agricultural Spray Drone Matters

Spray drones come in a wide range of sizes—from 10‑ to 20‑gallon “small” units to 40‑ to 55‑gallon “large” platforms. Each size class has strengths and weaknesses, and choosing the wrong one can cost you acres per hour, battery cycles, and even spray quality. The drone you pick determines how efficiently you can move across your fields, how well you can maintain spray height, and how much time you lose in turns, ferrying to the trailer for refills, and repositioning.

The right drone depends on a combination of factors that are unique to your operation. Field size is the obvious one, but it’s far from the only one. Terrain, obstacles, spray window pressure, and even the distance between your fields all influence which drone will give you the best return on investment. A drone that’s perfect for a Nebraska pivot field might be the wrong choice for a terraced Kansas hillside.

When you match the drone to the farm, you get better coverage, higher efficiency, lower drift risk, and more acres per hour. When you mismatch them you end up fighting the machine—burning batteries, wasting time, and losing efficiency in ways that add up fast.

Small Spray Drones (10–20 Gallons)

Precision Tools for Small Fields and Complex Terrain

Small agricultural spray drones are the unsung heroes of irregular fields, terraces, and short spray runs. They’re fast, nimble, and incredibly efficient in places where larger drones struggle. These drones are built for agility, not brute force, and that makes them ideal for farms with lots of small or oddly shaped fields. If your operation includes 20‑acre patches, narrow headlands, or fields broken up by waterways, a small drone often outperforms a larger one simply because it spends more time spraying and less time maneuvering.

Another advantage of small drones is their ability to adapt quickly to changing conditions. Because they weigh less and have lower inertia, they respond faster to wind gusts, terrain changes, and tight turns. This makes them safer and more predictable in complex environments. They also require less open space for takeoff, landing, and turning, which is a major advantage in fields with trees, terraces, or uneven boundaries.

Where Small Drones Excel

1. Small Fields (5–80 Acres)

Small drones thrive in fields where maneuverability matters more than tank size. They can slip into tight corners, follow irregular boundaries, and maintain efficiency even when the field layout forces frequent turns.

2. Short Spray Runs (Under 600–800 Feet)

Short runs punish large drones. Small drones accelerate faster, turn tighter, and reach full spray speed sooner.

3. Terraces, Hills, and Uneven Ground

Small drones respond faster to terrain changes because they have lower mass and faster altitude correction.

4. Obstacle‑Heavy Fields

Tree lines, poles, and waterways all favor a smaller footprint.

Large Spray Drones (40–55 Gallons)

Acreage Crushers for Big, Open Fields

Large agricultural spray drones are built for volume. They shine in big, clean fields where they can stretch out long spray runs and maximize their swath width. These drones are designed to replace or supplement ground rigs in large‑acre operations, delivering high throughput and consistent coverage across wide, open spaces.

Large drones also excel when spray windows are tight. When you need to finish spraying to beat the weather, a large drone’s combination of tank size, swath width, and reduced refill frequency becomes a major advantage. They’re built for speed and throughput, not agility, and they perform best when the field layout lets them operate without interruption.

Where Large Drones Dominate

1. Large Fields (300–1,000+ Acres)

Long spray runs allow large drones to take full advantage of their wide booms and high flow rates.

2. Flat or Gently Rolling Terrain

Large drones perform best when the ground is predictable.

3. Minimal Obstacles

Large drones need room to work.

4. High‑Volume Spray Windows

When fungicide season hits and every acre counts, large drones deliver.

Comparison Table: Small vs. Large Spray Drones

Decision Tree: Which Spray Drone Should You Choose?

Follow this simple path:

1. Are most of your fields under 80 acres?

→ Yes → Choose Small Drone
→ No → Continue

2. Do your fields have terraces, hills, or uneven ground?

→ Yes → Choose Small Drone
→ No → Continue

3. Are your spray runs shorter than 600–800 feet?

→ Yes → Choose Small Drone
→ No → Continue

4. Are your fields mostly large rectangles with long, clean spray lanes?

→ Yes → Choose Large Drone
→ No → Continue

5. Do you need to cover 300+ acres in a tight spray window?

→ Yes → Choose Large Drone
→ No → Continue

6. Do you have many trees, waterways, or narrow headlands?

→ Yes → Choose Small Drone
→ No → Choose Large Drone

Why? Physics, That’s Why.

Farmers don’t need a physics degree to understand why small drones outperform big drones in short‑run or complex fields — but the physics explains exactly what you see in real‑world operations.

1. Small Drones Accelerate Faster

Acceleration is impacted by the available thrust and the mass of the flying unit. Less mass, or more thrust, creates faster acceleration. Small (lighter) drones reach full spead sooner. And they can also stop faster.

2. Small Drones Turn Faster

Large drones have more rotational inertia.
Small drones pivot faster, re‑align faster, and waste less time in the headlands.

3. Small Drones Have a Tighter Turning Radius

Large drones need wide arcs.
Small drones can pivot tight — critical in terraces, waterways, and narrow headlands.

4. Small Drones Maintain Spray Height Better

Terrain‑following is a reaction‑time problem.
Small drones adjust altitude faster and maintain spray height more consistently.

5. Small Drones Spend More Time Spraying

In short‑run fields, small drones minimize:

• Turning
• Accelerating
• Decelerating
• Repositioning

Large drones maximize all of those.

That’s why a small drone can sometimes cover more acres per hour than a large drone in a field full of short, broken‑up spray lanes.

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