Morais, P.P.P. et al. 2018. Yield components and reproductive, physiological, and root traits used in early selection for nitrogen use efficiency in corn. Pesquisa Agropecuaria Brasileira. 53, 5 (Aug. 2018), 633–640. DOI:https://doi.org/10.1590/S1678-3921.pab2018.v53.25308.