Kara, Burhan, and Metin Mujdeci. 2010. “Comparison of Minimum and Conventional Tillage Systems and Different Nitrogen Doses on Grain Yield of Barley (Hordeum Vulgare L)”. Asian Journal of Chemistry 21 (2):1513-20. https://asianpubs.org/index.php/ajchem/article/view/18856.