How cover crops affect corn, beans
In fall 2008, six farmers began a study to test the effect of a cereal rye cover crop on grain yields of corn and soybeans. Five additional farmers joined in fall 2009, and 10 sites were maintained from 2009 to 2012. Eight sites now remain in this long-term project, done as part of a partnership between Iowa Learning Farms and Practical Farmers of Iowa. Its main objective is to find how a cov