CHANDRASEKHARARAO, C, et al. “Effect of Different Levels of Nitrogen and Leaf Position on Biochemical Quality Constituents of FCV Tobacco (Nicotiana Tabacum) Grown in Northern Light Soils of Andhra Pradesh”. The Indian Journal of Agricultural Sciences, vol. 83, no. 10, Oct. 2013, https://epubs.icar.org.in/index.php/IJAgS/article/view/33666.