Resumo

SANCHEZ, Miguel et al. Changes in the quality of two soils under torobas use in semiarid region of Venezuelan. Rev. Mex. Cienc. Agríc [online]. 2016, vol.7, n.3, pp.481-492. ISSN 2007-0934.

In order to evaluate the antierosivo device called toroba, physical and chemical properties of the soil were determined, after 20 years of operation thereof they. For this purpose, soil samples were taken two torobas: one located in the area of Zamurito; another, in Mide, located in western Falcon state. Soil samples according to the position of the toroba (high, medium and low) were obtained. Samples were collected at depth (0-20 cm). The particle size distribution, bulk density, saturated hydraulic conductivity, and total pore space and micropores percentage of macro, infiltration rate and aggregate stability: The following properties were evaluated as for the chemical properties, soil reaction (pH), electrical conductivity (CE), organic matter (MO) and nitrogen (N), phosphorus (P) and available potassium (K). Data were analyzed by analysis of variance and Tukey tests average, using the statistical program Infostat. The results showed that the most difficult in the industry Zamurito physical conditions were associated with poor structural development and high content of clay and lim. Mide in the sector, physical conditions favored water infiltration. Most nutrient accumulation was observed in the Zamurito sector product of the contributions of organic matter from plant debris.

Palavras-chave : aridity; desertification; fertility.

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