VENUGOPALAN, M V; BLAISE, D. Effect of planting density and nitrogen level on canopy spectral reflectance and productivity of upland cotton (Gossypium hirsutum)*. The Indian Journal of Agricultural Sciences, Delhi, India, v. 71, n. 9, 2014. Disponível em: https://epubs.icar.org.in/index.php/IJAgS/article/view/40248. Acesso em: 4 jul. 2026.