Marchi, Giuliano, Vladimir Antonio Silva, Luiz Roberto Guimarães Guilherme, José Maria Lima, Francisco Dias Nogueira, and Paulo Tácito Gontijo Guimarães. “Potassium Extractability from Soils of Brazilian Coffee Regions”. Bioscience Journal 28, no. 6 (December 21, 2012): 913–919. Accessed November 23, 2024. https://seer.ufu.br/index.php/biosciencejournal/article/view/13654.