The growing and turning of green manure cover crops provides additional nutrients and organic matter to the soil. When incorporated into the soil, these plants break down, eventually releasing important nutrients, such as nitrogen, that are necessary for adequate plant growth. It also increases soil drainage and water retention capabilities. In addition to adding nutrients and organic materials to the soil, green manure crops can be grown to scavenge leftover nutrients following the harvest season. This helps prevent leaching, soil erosion, and weed growth.