Baptista, J. de A. et al. 2000. Ammonium uptake kinetics and root growth of the rice cultivars Agulha and Bico Ganga. Pesquisa Agropecuaria Brasileira. 35, 7 (Jul. 2000), 1325–1330. DOI:https://doi.org/10.1590/S1678-3921.pab2000.v35.5934.