“Impact Of Inorganic Nitrogenous Fertilizers And Farmyard Manure Combination On Nitrogen Content By Grain, Straw At Harvest And Protein Content Of Grain In Ppm”. Journal of Pharmaceutical Negative Results (March 14, 2023): 3081–3085. Accessed June 7, 2026. https://www.pnrjournal.com/index.php/home/article/view/9427.