CHANGES IN SOIL PROPERTIES IN FUNCTION OF DIFFERENT SOIL USES IN THE IRRIGATED PERIMETER OF ICO-MANDANTES IN THE SEMIARID REGION OF PERNAMBUCO, BRAZIL

The aim of this study is to evaluate land uses, using physical and chemical attributes in the irrigated perimeter Ico-Mandantes, between Petrolândia and Floresta, in the semiarid region of Pernambuco, Brazil. The identified uses of the land are as follows: short cycle crops (C), fruit (F), pasture (P), abandoned areas (D), and native vegetation (V). This study evaluated the uses C, F, D, P and V. In both places, samples were collected from deformed soil at 0–10, 10–30, and 30–60 cm, as well as non-deformed soil from the first two layers to the physical determinations and chemical properties. The data of physical and chemical analyses were subjected to descriptive linear analysis and multivariate analysis, the technique of principal component analysis, and clustering by the Tocher method. The use of the native vegetation differed from all other uses among the analyzed layers, thereby indicating that the productive uses which were evaluated, promote in fact changes in the physical and chemical layers studied. The analysis of the physical and chemical attributes do not differentiate any of the productive uses systematically analyzed in all layers