Ochoa Alejo, N. Crocomo, O.J. Biochemical and physiological aspects of sugarcane (Saccharum spp.). 2. Effect of NO3-N, NH4+-N and urea-N on carbohydrate level and growth of cv. NA56-79 [bioquimica vegetal, cana de acucar, nitrogenio] Subjects--Topical Terms: NITROGENIOCANA DE ACUCARUREIA