Abstract Crabgrass ( Digitaria spp.) is deemed as a productive and nutritious warm‐season annual forage for livestock in the U.S. transition zone. However, there limited information about nitrogen (N) source rate effects on productivity nutritive value of crabgrass North Carolina. Herbage accumulation (HA), N removal, crude protein (CP), total digestible nutrients (TDN), tissue nitrate (NO 3 − ...