Nasution, Ade Fitriadi, and Rasmita Adelina Harahap. “Analysis of Soil Biological Conditions in Organic and Inorganic Agriculture Areas in Tanah Datar Regency”. Jurnal Pertanian Tropik 8, no. 3, Dec (February 20, 2022): 169-174. Accessed August 15, 2022. https://talenta.usu.ac.id/jpt/article/view/7543.