Fall, T., A. Freidenreich, S. Swartz, C. Vincent, Y. Li, and Z. Brym. “Questions and Answers for Using Sunn Hemp (Crotalaria Juncea L.) As a Green Manure Cover Crop: SS-AGR-444/AG443, 7/2020”. EDIS, vol. 2020, no. 5, Oct. 2020, p. 4, doi:10.32473/edis-ag443-2020.