CHARACTERIZATION AND USE OF SOIL IN SEMI-ARID REGION MIDDLE WEST OF RIO GRANDE DO NORTE

The local as regional landscape presents two distinct landscapes: sediments removal from elevated parts and Pedoenvironmental of accumulation of sediments in the area of sandbank with the pedoforms convex-convex, with the biggest curvatures in the sandbanks. The objective of the present work was of characterize physically, morphologicament and chemically the soils groups, located in Semi-Arid region of the medium one West of Rio Grande do Norte, Brazil. Few studies about the morphology, mineralogy, genesis and classification of the soils developed in the state of Rio Grande do Note mainly in the medium one West of Northeast of Brazil. Inside this context eight soils representative of that landscape into caatinga were characterized by means of description morphologic, granulometric and chemical. The results observed in the granulometry of the Luvisol and Neosol reflect basically the different deposition situations in those soils. The high values of organic matter and nitrogen in the superficial horizons, decreasing with the depth and the strong presence of calcium and magnesium justified the variation of pH and the high value of the cation exchange capacity.