Clark, 2007. Managing Cover Crops Profitably, 3rd edition, Sustainable Agriculture Network, Beltsville, MD Document reference Clark, A., 2007. Medics. Managing Cover Crops Profitably, 3rd edition, Sustainable Agriculture Network, Beltsville, MDWeb http://mccc.msu.edu/wp-content/uploads/2016/09/ManagingCoverCropsProfitably_medi…Citation key Clark, 2007Datasheets Black medic (Medicago lupulina)
