Effect of irrigation, N, and P on yield and yield attributes of spring sunflower (Helianthus annuus L.). (228). Tropical Agriculture, [S. l.], v. 76, n. 4, 1999. Disponível em: https://journals.sta.uwi.edu/ojs/index.php/ta/article/view/1522. Acesso em: 16 jun. 2025.