ANALYSIS OF PHYSICAL AND CHEMICAL PROPERTIES OF SOIL UNDER DIFFERENT MANAGEMENTS IN SOUTHEAST OF PARA STATE

Abstract

In order to assess physical and chemical soil properties under different managements, on the family farm, in southeast of Para state, it was collected soil samples in areas of primary forest (PF), pasture with legumes (PL) and single pasture (SP) at two depths (0 to 5 and 5 to 10 cm). Physical analyzes: particle size, Dp, Ds and Ptotal, as well as chemical analysis: pH in water, Al3+, Ca2+, Mg2+ and exchangeable Na+, K+ and P, H+Al and TOC. To test the significance of differences between treatment means, we applied the Tukey test at 5% probability, making use of completely randomized design with three treatment (PF, PL and SP) and three replications, the depths were studied separately. SP showed higher values ??for DS and Ptotal ??for depth 0 to 5 cm. However, the depth 5 to 10 cm, PL and SP did not differ for these attributes. PL had the highest value for soil pH and also lower values ??for Al3+ and H+Al. There was no significant difference between treatments, and depth, for P, K+, Ca2+, Mg2+. Na+ has differed only in the first depth, with PF having the highest value. PF presented the highest value to TOC.    KEYWORDS: Family farming. Legumes. Pasture. Soil.