The objective of this work was to study the distribution of K and Mg reserve in different sand fraction classes of soils from the Triângulo Mineiro region (Minas Gerais state, Brazil), emphasizing the potential to release non-exchangeable and structural forms of these nutrients to plants. Sites were chosen for sampling based on the different parent materials (sandstone – Bauru Group, Granite – Araxá Group, basalt – São Bento Group and sediments – Detritic-Lateritic-Tertiary Cover), weathering degree, and spatial lithology representation. […]

Few studies relate the K reserve in soils developed in a humid tropic climate with the minerals found in the clay fraction. Nineteen soils were collected for this purpose in the Triângulo Mineiro region, Minas Gerais State, Brazil, developed from different parent materials and different weathering degrees. Due to the greater occurrence, a larger number of samples of the Bauru Group was collected, comprising all the geological formations found in the region. The total K content in soil and the sand, […]