Green manure (Catch crops)

Green manure is a type of crop that is grown to improve the fertility of soil. It is usually a type of legume, such as alfalfa, clover, or vetch, which is planted, allowed to grow, and then plowed back into the soil, adding organic matter and nutrients. Green manure helps to improve soil structure, suppress weeds, reduce erosion, and improve water retention. Legumes are a type of plant that are able to take nitrogen from the atmosphere and fix it in the soil. This means that they can be used to supply nitrogen to other crops, helping to improve soil fertility and increase crop yields.