At this point, with corn and soybeans growing to maturity, adding a cover crop this fall can be done in two basic ways: broadcast the seed or drill it.
Broadcasting cover crop seed takes place while the major cash crop is still in the field, towards the end of the season.
- Aerial seeding is perhaps the most efficient. Seed is delivered to a nearby airfield and loaded in a plane equipped for dispersing a variety of seed types into standing corn or beans.
- High clearance equipment is outfitted with seed spreaders on long booms.
The challenges in broadcast application often depend on the equipment. For example, you would need to research your area for an experienced pilot with the proper adjustable seeding set up. Likewise with high clearance equipment: while do-it-yourselfers retrofit their equipment for multipurposes, others find the solution in renting equipment or contracting the application of cover crop seed.
The edge that high clearance equipment has over aerial is twofold: precision and certainty. Whereas planes can be grounded because of weather, rolling equipment has few restrictions in that area. Likewise, aerial application can sometimes create voids in coverage due to seed drift, utility infrastructure and property lines. High clearance equipment, on the other hand, can deliver seed reliably and consistently to every corner of your field.
Drilling Cover Crop Seed used to be the standard in cover crop planting but has become less popular because of one basic reason. The timing for drilling is a problem for many, given the uncertainty with weather after harvest, when drilling is done. Cover crops need passable fields and a month or more of good weather to establish. Broadcasting usually removes that barrier because is is done before harvest takes place.