As the northern Illinois sun rises and Matt Klein prepares for the final stretch of harvest, he glances toward his cornfield and sees the dark rain clouds letting loose across the horizon. For most farmers, rain halts field operations. For Klein, the timing couldn’t be better.
Twenty-four hours earlier, he called in Logan Wright, owner of Wright Drone Services LLC, to broadcast 40 lb. of cereal rye and 20 lb. of a crimson clover-radish mix per acre directly into his standing corn.
“The best time to seed cover crops is right before a steady rain. If you know that you’re going to have a good soaking rain, put a cover crop down the day before,” Wright says.
Klein switched from ground-based seeding to drones two years ago. The aerial approach allows him to establish a cover crop weeks before harvest without running heavy tractors or drills across the field, limiting soil compaction. According to university extension experts, drones also give him the ability to seed hard-to-reach terraces and persistently wet field pockets that conventional ground equipment cannot touch.
While a ground rig might get bogged down or cause yield loss in standing crops, Wright can comfortably cover 200 to 300 acres in an eight-hour workday by air, flying over the canopy at consistent speeds.
Calibrating the Spread
Despite the logistical benefits, broadcast seeding from the air requires a shift in mindset. Klein admits a conventional drill remains the gold standard for seed-to-soil contact, and letting a drone handle the job requires a bit of faith.
“When we observed the drone while it was seeding, it didn’t look like there was enough seed on the ground, but the numbers worked out,” Klein says. “I was encouraged by how even the drone spread the seed as long as the operator knew how to calculate the spread.”
Dialing in that pattern comes down to equipment capacity and weather discipline. This year, Wright flew a DJI Agras T50 equipped with a dry-spreader hopper that holds around 110 pounds of seed. He recently purchased an Agras T100 to double the spreading payload to 220 pounds and cut down on refill cycles.
To avoid erratic patterns and streaking, Wright avoids spreading when wind exceeds 10 mph. He also does not fly when it is raining.
“We don’t want to seed in standing water by any means, but when soil is damp it is a really good time to put a cover crop on for quick germination and to be able to get that plant growing before the frost comes,” he explains.
Giving Roots a Head Start
The sweet spot for aerial seeding runs from late August through mid-October. By that point, the crop canopy begins to dry down and open up, allowing sunlight to reach the soil surface. Once harvest begins, Wright notes, the established cover crop is hardy enough to withstand combine traffic without interfering with harvesting equipment.
That early head start is what drew Randy Oertwich, a second-generation farmer who raises 2,000 acres of corn and soybeans in Nebraska. Oertwich used a local Nebraskan droning company to fly a mix of radishes and turnips into his standing crops to ensure deep taproots had time to develop before the ground froze.
“By seeding early, the increased cover crop size going into winter is a benefit, so it’s a win-win,” Oertwich says. “[Growing a cover crop] is almost like running a tillage tool. If given enough time to grow, the cover crops get so large, and then when they die, they leave such points in the ground that it reduces compaction.”
Weighing the Dollars and Cents
For growers considering custom drone application, the math pencils out competitively.
Wright charged Klein $15 per acre, though rates fluctuate depending on seed weight and target seeding volume. In Nebraska, Oertwich paid between $12 and $13 per acre for custom aerial application.
To offset initial investments, Oertwich used cost-share support through the USDA Natural Resources Conservation Service’s Environmental Quality Incentives Program (EQIP) on 300 acres. EQIP offers at least 50% of the contracted payment upfront to help producers purchase seed or hire contracted custom services.
“EQIP is enough for a lot of producers to try [cover crops] and see the benefits because they have somebody to help share in the expenses and also to help them come up with the proper seed mixtures for their cover,” Oertwich says.
While custom fees and seed bills represent an upfront cash outlay, both farmers view aerial cover cropping as a long-term economic hedge against input volatility and weed pressure.
“I can now see that cover crops tie up your nutrients, and, in the long run, it’s going to lower your fertilizer input costs,” Oertwich says.
