Florida vegetable farmers who grow cover crops as a green manure between their cash crops anecdotally tout the health benefits, but a two-year study by University of Florida has provided the research to back it up. In a Southern Sustainable Agriculture Research and Education (SSARE) On-Farm Research Grant, University of Florida soil health expert Jehangir (Jango) Bhadha shadowed the cover crop practices of eight farmers across the state to measure the benefits of using cover crops (mainly cow pea and sunn hemp) as a soil amendment and nutrient source for subsequent cash crops.

Red clover can be an excellent green manure that fixes nitrogen, suppresses weeds, and increases corn yields. As a slow-growing cool-season legume, it is suitable to undersowing into winter small grains in early spring. Read more in this article from the University of Nebraska.

Four cold-tolerant faba bean germplasm lines are now available for developing pulse or cover crops that can be rotated with wheat and other cereal grains grown in the Pacific Northwest, says the USDA's agricultural research service.