Delibaltova, Vanya, and Hristofor Kirchev. “Productivity of Common Wheat (Triticum Aestivum L.) Depending on Predecessor and the Level of Nitrogen Fertilization”. International Journal For Research In Agricultural And Food Science 2, no. 6 (June 30, 2016): 01–10. Accessed December 22, 2024. https://gnpublication.org/index.php/afs/article/view/493.