21. Cover crops typically must be crimped when they enter the flowering / pollination stage.22. For these reasons, it is often used as a green manure and cover crop . 23. One warning : Many cover crops flower heavily, attracting large numbers of assorted bees. 24. Most plants used for cover crops are grasses or legumes. 25. Interest exists in developing " Mucuna " species as a sustainable, edible cover crop . 26. There's no single best way to use a cover crop . 27. Crop rotation and cover crops can positively impact tilth. 28. Certain varieties of daikon can be grown as a winter cover crop and green manure. 29. When compared to other cover crops , rye is superior in all characteristics associated with cover crops 30. Growing a cover crop extends the time for AM growth into the autumn, winter, and spring.