Rodrigues, Antonio Carlos da Gama, and Ricardo Augusto Calheiros de Miranda. 1992. “Variation of PH and of Nutrients Content of Rainfall and Throughfall in a Southern Bahia Cacao Agrosystem”. Pesquisa Agropecuaria Brasileira 27 (5):771-76. https://doi.org/10.1590/S1678-3921.pab1992.v27.3710.