M. V. VENUGOPALAN and D. BLAISE, “Effect of planting density and nitrogen level on canopy spectral reflectance and productivity of upland cotton (Gossypium hirsutum)*”, Indian J Agri Sci, vol. 71, no. 9, Apr. 2014, Accessed: Jul. 04, 2026. [Online]. Available: https://epubs.icar.org.in/index.php/IJAgS/article/view/40248