Sampath, O., M. Madhavi, and P. Chandrashekar Rao. 2014. “Effect of Nitrogen Fertilization on Growth, Yield Attributes, Grain Yield of Hybrid Maize Genotypes”. The International Journal of Science & Technoledge 2 (1). http://internationaljournalcorner.com/index.php/theijst/article/view/131936.