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.
Growing a fall cover crop is one of those good garden tasks that we all know we should do, but often don't find the time for. Cover crops control erosion, attract pollinating insects, break up heavy soils, improve soil fertility and structure, and reduce weeds. Plus, some, such as red clover, have edible flowers.egume cover crops, such as hairy vetch and crimson clover, through a symbiotic relationship with the rhizobia bacteria on their roots, convert atmospheric nitrogen into a form plants can use to grow. When the cover crop is tilled under, the nitrogen is released for the next crop.