Machado, Pedro Luiz Oliveira de Almeida, and Marcos Antonio Pavan. “Evaluation of Chemical Methods for Extracting Available Zinc in Acid Soils for Coffee”. Pesquisa Agropecuaria Brasileira 22, no. 2 (April 17, 2014): 213–217. Accessed November 11, 2025. https://apct.sede.embrapa.br/pab/article/view/14304.