S. S. U. Caballero, P. L. Libardi, K. Reichardt, S. O. Moraes, and R. L. Victória, “Leaching of N derived from the soil and from [(15NH4) 2SO4] fertilizer during the growth cycle of bean plants”, PAB, vol. 21, no. 1, pp. 25–31, Apr. 2014.