Erosion Control - Cover crops reduce wind and water erosion on all types of soil and landscape.
Fertility Improvements - Legumes can add a substantial amount of available nitrogen to the soil. Non-legume cover crops can be used to take up excess nitrogen from previous crops.
Weed Suppression - A dense stand of cereal rye or other cover crops can supress weeds by shading and allelopathic effects on some grasses and weeds.
Soil Quality - Water filtration, soil tilth, compaction reduction, and the addition or organic matter are a few of the improvements that can be experienced using cover crops.