The effect of nitrogenous fertilizers on the non-protein nitrogenous fraction of grassland herbage

The non-protein nitrogenous (NPN) fraction of grassland herbage given a range of repeated nitrogenous fertilizer treatments has been examined. The herbage was intended for conservation and the treatments were 0, 2, 4, and 6 cwt. ‘Nitro-Chalk’ per acre per cut, applied early, after cutting, and late, 10–14 days before cutting.