[1]
A. F. de Souza and M. de O. Brasil Sobrinho, “ NPK effect, in foliar spraying, on the nutrients composition of cotton leaves ”, An. Esc. Super. Agr. Luiz de Queiroz, vol. 44, no. 1, pp. 215–243, Jan. 1987, doi: 10.1590/S0071-12761987000100011.