Sangoi, Luis, and Milton Luiz de Almeida. “Rates and Time of Nitrogen Application to Maize in a Soil With High Rate of Organic Matter”. Pesquisa Agropecuaria Brasileira, vol. 29, no. 1, Jan. 1994, pp. 01-91, doi:10.1590/S1678-3921.pab1994.v29.4022.