Silva, D. C. da C. e, Albuquerque Filho, J. L., Oliveira, R. A. de, & Lourenço, R. W. (2018). Methodology proposal for spatial analysis of soil nutrients in watersheds. Sociedade & Natureza, 30(3), 85–107. https://doi.org/10.14393/SN-v30n3-2018-5