“Physical and Chemical Analysis of Agricultural Soils in Southern Manabí and Their Relationship With Crops (Original)”. Roca. Scientific-educational publication of Granma province. 18, no. 3 (May 3, 2022): 207–228. Accessed May 11, 2026. https://revistas.udg.co.cu/index.php/roca/article/view/3457.