‘Georgia Bush’ velvetbean (Mucuna pruriens) and sunn hemp (Crotalaria juncea)
Martini, Nicole Lucille
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Velvetbean (Mucuna spp.) and sunn hemp (Crotaleria juncea) have been used for many years in agricultural systems worldwide. Little information exists on these crops as sources of biomass and nutrients in vegetable production in the U.S. My objective was to determine the best planting and cutting dates for these cover crops. Tifton vlevetbean biomass was greatest for the April planting harvested 120 DAP. Watkinsville velvetbean biomass was greatest for the May planting harvested 90 DAP. Tifton sunn hemp biomass was greatest for the July planting harvested 120 DAP; the Watkinsville May planting harvested 120 DAP was greatest. Nitrogen and other nutrients accumulated were substantial in both cover crops at 90-120 DAP in both locations. Biomass production was positively correlated with temperature and rainfall. This study shows sunn hemp and velvetbean can be useful cover crops for growing in rotation with vegetable crops in the Tifton and Watkinsville, GA areas.