CARACTERIZAÇÃO FÍSICO-HÍDRICA DE SOLOS CASCALHENTOS DO BRASIL CENTRAL

Abstract

The insertion of gravel soils in the grain production process has been carried out disorderly manner and resulting in cases of success or manipulation. The knowledge of the physical-hydric behavior of the soils can form the basis for the selection of new potential areas for conversion into agricultural fields. However, soil sampling with gravel is a challenge, as a coarse fraction constitutes a difficulty to be overcome. With Therefore, the objective of this research was to evaluate the physics of gravel soils in central and southern Brazil. to characterize them. For that, undisturbed samples were collected in ten gravel soils in the states of Goiás and Tocantins. Cambisols, Plinthosols and Oxisols present similar physical-hydric behavior and with restrictions to intensive use for the production of grains that require caution when incorporating them into the production process. of soils evaluated, the gravel content constituted the main limitations. The evaluation of relationships of mass and volume of soil constituents allows critical considerations to the System Brazilian Soil Classification, notably on the determination of fractions thick in base volume. The results suggest a reclassification of Plinthosol or, more predominantly, the redefinition of the theoretical limits used as intended for order.