Souza, Ênio Gomes Flôr, et al. “Economic Nitrogen Rate for Fertigation of Green Corn Crop in the Brazilian Semiarid”. Pesquisa Agropecuaria Brasileira, vol. 54, no. X, Nov. 2019, p. e00556, doi:10.1590/S1678-3921.pab2019.v54.26533.