VENUGOPALAN MV, BLAISE D. Effect of planting density and nitrogen level on canopy spectral reflectance and productivity of upland cotton (Gossypium hirsutum)*. Indian J Agri Sci [Internet]. 2014 Apr. 29 [cited 2026 Jul. 4];71(9). Available from: https://epubs.icar.org.in/index.php/IJAgS/article/view/40248