Dagash, Yassin, and A. A. Azrag. “Effect of Sowing Date and Nitrogen Rate on Growth,Yield Components of Sorghum (Sorghum Bicolor L.) And Nitrogen Use Efficiency”. Journal of Progressive Research in Biology 2, no. 2 (November 17, 2015): 78-87. Accessed May 7, 2024. http://scitecresearch.com/journals/index.php/jprb/article/view/261.