KANAREUGSA, C. Critical Concentrations of Nitrogen, Phosphorus and Potassium in Rice Plant. Agriculture and Natural Resources, Bangkok, Thailand, v. 14, n. 1, p. 69–80, 1980. Disponível em: https://li01.tci-thaijo.org/index.php/anres/article/view/240832. Acesso em: 18 sep. 2026.