V. Okunev, Rodion, Elena S. Vaganova, and . . “Laboratory Research of the Effect Fertilizers on the Soil Structure”. International Journal of Engineering & Technology 7, no. 4.7 (September 27, 2018): 212–214. Accessed July 18, 2024. https://sciencepubco.com/index.php/ijet/article/view/20547.