MURTHY, I Y L N; PADMAVATHI, P. Establishment of critical zinc, phosphorus: zinc ratio limits in safflower. The Indian Journal of Agricultural Sciences, Delhi, India, v. 78, n. 2, 2011. Disponível em: https://epubs.icar.org.in/index.php/IJAgS/article/view/2638. Acesso em: 27 oct. 2025.