Amaral, J. A. T. do; Cordeiro, A. T.; Rena, A. B. Effects of Aluminum, Nitrate and Ammonium on the Metabolic Nitrogened Composition and of Carboidrates in Stylosanthes Guianensis and S. Macrocephala. PAB 2000, 35 (2), 313-320. https://doi.org/10.1590/S1678-3921.pab2000.v35.5769.