Now as some farmers are trying to use cover crops, they lack the information and experience to be successful. University and private researchers are going back to the basics and are experimenting with beneficial plants to determine how they can best be used in modern farming practices to supplement or replace purchased inputs. Cover crops have an important role in successful sustainable farming systems. Water infiltration is improved as well. When a field lays fallow for a period of time, the surface tends to seal and water will run off.
Cover crops protect the soil surface and reduce sealing.
Also, beneficial organisms in the soil, such as earthworms, thrive when fresh plant material is decomposing. Organic matter levels tend to improve with the addition of cover crops. By having the soil held in place by cover crops during the fall, winter, and early spring, loss of soil from erosion is greatly reduced. Non-legumes can be used to take up excess nitrogen from previous crops and recycle the nitrogen as well as available phosphorus and potassium to the following crop. This is very important after manure application, because cover crops can reduce leaching of nutrients.