2024-08-222024-08-222024-08-222022-06-06https://repositorio.ifal.edu.br/handle/123456789/629The expansion of agricultural activities with conventional management in the semi-arid region of Brazil, associated with the intrinsic characteristics of the soil in this region, can directly or indirectly influence soil aggregation and, consequently, the storage of soil organic carbon (COS). Thus, the objective of this work was to evaluate the impacts promoted by conventional land use systems (agriculture and pasture) on the stability of aggregates of different types of soils in the municipalities of Traipu and Santana do Ipanema, located in the semi-arid region of the state. From Alagoas. Soil samples were collected in the municipalities of Traipu and Santana do Ipanema. In total, four areas were sampled. In each of the areas, samples were collected in three trenches (replications) at different depths. The stability analysis of aggregates in water was performed using Yoder's agitator equipment, and later, the soil aggregation indices were calculated: weighted average diameter, geometric average diameter, stability index and instability index. The results obtained were submitted to analysis of variance (ANOVA) using the F test. Differences between the means were tested using the Tukey test (p<0.05). The results showed that the pasture system with less time (4 years) presented smaller amounts of macroaggregates (diameter >2.00 mm), and greater distribution of mesoaggregates (diameter of 2.00 and 0.25 mm) and microaggregates (diameter < 0.25 mm) compared to native forest and other pastures. The IS values revealed that the agricultural system with 47 presents physical conditions of the soil closer to its natural form in the deeper layers of the soil.Acesso AbertoCaatingaCultivo convencionalQualidade do SoloConventional tillageSoil qualityTrabalho de Conclusão de CursoCIENCIAS AGRARIAS