The soil acidity and associated variables are very important on soil management, especially at tropical and subtropical regions. In order to study some soil acidity variables and verify the influence of clay mineralogy on the relationship between pH and base saturation degree (V%), soil samples were collected from B and C horizons of different soil classes in Paraná State: Acric Red-Yellow Latossol (LBw-1), Dystric Red-Yellow Latossol (LBw-2), Dusky Red Latosol (LVdf), Alumic Cambisol (CXa) and Dystric Cambisol (CHd). The clay […]