1.
Valchovski I, Petkova Z, Kutev V, Pchelarova H, Markov E, Katsarova A. Agrochemical Valuation of Different Subtypes Chernozem and Fertilization Optimization of Basic Crops. BJSSAE. 2014;48(3-4):22-30. Accessed November 12, 2026. https://agriacad.eu/ojs/index.php/bjssae/article/view/2264