GUPTA, R K; SINGH, VARINDERPAL; SINGH, YADVINDER; SINGH, BIJAY; THIND, H S; KUMAR, AJAY; VASHISTHA, MONIKA. Need-based fertilizer nitrogen management using leaf colour chart in hybrid rice (Oryza sativa). The Indian Journal of Agricultural Sciences, Delhi, India, v. 81, n. 12, 2011. Disponível em: https://epubs.icar.org.in/index.php/IJAgS/article/view/13313. Acesso em: 26 oct. 2025.