Abstract

MAGGI, Alejandro Esteban; BEHRENDS KRAEMER, Filipe; INTROCASO, Rafael Mario  and  THOMPSON, Delfina. Caracterización física y química de un argiudol vértico de la pampa ondulada con erosión hídrica en el surco y entresurco. Cienc. suelo [online]. 2016, vol.34, n.1, pp.113-126. ISSN 1850-2067.

In the Pampas region, water erosion is one of the main causes of land degradation. Changes in some physical and chemical characteristics and properties were studied in the rill and the interrill with water erosion, with or without concentrated flow in a Vertic Argiudoll. Changes in the values of organic matter, grain size, aggregate stability, bulk density and soil depth to the upper limit till the Bt horizon as an indicator of soil loss were analyzed. Furthermore, some soil variables were related with the soybean crop yield. The intensity of water erosion is mainly expressed in the reduction of total organic carbon content and aggregate stability. However, for the distinction between the rill and interrill erosion types, the depth of the upper boundary of the Bt horizon was the key factor. The reduce of the Bt horizon depth was higher because of the interrill, generating more adverse characteristics for plant growth. The decline in yields of the soybean cultivation in the rill respect to the interrill, showed a positive coefficient of determination, r² = 0.84 and p <0.0001 with the depth of the upper limit of the Bt horizon. No significant differences in change of the percent of the different soil grains size were detected between the different types of water erosion.

Keywords : Total organic carbon; Bulk Density; Horizon Bt; Soybean.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )