Nitrogen use efficiency of legume-grass and grass pastures

Studies on nitrogen accumulation, fiber chemistry, and in vitro digestibility of alfalfa

“…Literature reports for the amount of N2 fixed by alfalfa range from 56 to 463 kg ha ^ yr ^ (Nutman, 1976;Burns and Hardy, 1975). The percentage of total N accumulated annually in alfalfa that is derived by symbiotic fixation is also quite variable, ranging from less than 40% (Heichel et al, 1981) to greater than 90% (West, 1981).…”