A frenulum (or frenum) is a small fold of tissue that prevents an organ in the body from moving too far.
Cover crops usually are grown to prevent soil loss from wind and water erosion. Use fast-growing cover crops, such as winter wheat or annual rye, on fall-spaded gardens. A second, and probably more important reason home gardeners should use cover crops is to improve soil structure and increase organic matter.
One of the primary uses of cover crops is to increase soil fertility. These types of cover crops are referred to as green manure.. They are used to manage a range of soil macronutrients and micronutrients.