POUNGPRAKHO, K. Competition in Maize by Annual Weeds ІІ Effects of Nitrogen Fertilizer and Weeds on Yield components . Thai Agricultural Research Journal, [S. l.], v. 8, n. 2, p. 34–38, 1990. Disponível em: https://li01.tci-thaijo.org/index.php/thaiagriculturalresearch/article/view/242414. Acesso em: 1 oct. 2026.