Souza, Augusto Ferreira de, and Moacyr de O.C. Brasil Sobrinho. 1987. “ NPK Effect, in Foliar Spraying, on the Nutrients Composition of Cotton Leaves ”. Anais Da Escola Superior De Agricultura Luiz De Queiroz 44 (1): 215-43. https://doi.org/10.1590/S0071-12761987000100011.