DOGAN, RAMAZAN, NECMETTIN CELIK, and NEVZAT YURUR. “Requirement and Application Frequencies of Nitrogen Fertilizer on Bread Wheat Variety, Arpathan-9”. Asian Journal of Chemistry 20, no. 4 (March 30, 2010): 3069–3078. Accessed October 3, 2024. https://asianpubs.org/index.php/ajchem/article/view/12681.