Campos, Tarcísio Gomes da Silva, and Francisco Assis de Oliveira. 1991. “Effects of Urea-N Levels on Yield of Irrigated Upland Cotton, Cv. Cnpa Precoce 1”. Pesquisa Agropecuaria Brasileira 26 (9):1381-85. https://doi.org/10.1590/S1678-3921.pab1991.v26.3477.