By Andi Anderson
Agricultural drones are gaining popularity beyond spraying fungicides—they’re now being used to interseed cover crops efficiently and effectively. These drones can broadcast granular products at speeds covering 50+ acres per hour, making them a practical tool for reaching wet, narrow, or tree-lined fields.
One major benefit of drones is their ability to enter fields without damaging standing crops, which is a challenge for traditional ground machinery or large aerial applicators. Their flexibility allows timely applications regardless of weather or field size.
Timing plays a crucial role in cover crop success. Interseeding is most effective just before rainfall, helping seeds settle into the soil and grow properly. Drones can be deployed quickly to take advantage of such windows.
A recent Ohio State University study explored how canopy conditions affect seed distribution in corn and soybeans. The team interseeded cover crops at three stages: 100% green canopy, 50% green, and fully dried down. In corn, canopy condition didn’t significantly change seed distribution, though some seeds were intercepted by leaves.
In soybeans, dense green canopies funneled more seeds between rows, but there was no difference between 50% green and fully defoliated stages in terms of overall success.
Drone payloads meet USDA-NRCS seeding rate recommendations, including the 20% extra rate to account for lower emergence due to limited soil contact. However, choosing the right cover crop is important.
Farmers should consult the USDA-NRCS Appendix A for guidance on seeding rates and crop selection by purpose and species.
Most cost-share programs require following USDA timelines and seeding standards. In Ohio, for cold season cover crops, recommended planting runs from July 15 to November 15, though drones allow greater flexibility within that window.
Farmers should check with their local Extension office for advice on the best cover crops for their region and any specific program requirements.
Photo Credit: usda
Categories: Ohio, Equipment & Machinery