Is there a bright side to using sunn hemp as a cover crop?

According to USDA-NRCS, sunn hemp – which is not related to that other kind of hemp – can improve soil properties, reduce soil erosion, conserve soil water and recycle plant nutrients. When it’s grown as a summer annual, sunn hemp can produce over 5,000 lbs. of biomass and 100 lbs. of nitrogen/acre. And it can produce