Sachs, Luís Guilherme, Antonio Paulo Portugal, Sandra Helena Prudencio Ferreira, Elza Iouko Ida, Paula Jimena Diniz Sachs, and Juliane Priscila Diniz Sachs. “Influence of NPK on Yield and Chemical Components of Sunflower”. Semina: Ciências Agrárias 27, no. 4 (July 30, 2006): 533–546. Accessed December 5, 2025. https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/2493.