Castro, Abeilard Fernando de, and Neli do Amaral Meneghelli. “The Ratios K+ (Ca++ + Mg++)1 2 and K+ (C++ + Mg++) in the Soil and the Responses to Potassium Fertilization”. Pesquisa Agropecuaria Brasileira 24, no. 6 (April 17, 2014): 751–760. Accessed November 12, 2025. https://apct.sede.embrapa.br/pab/article/view/15915.