Mapping of soil degradation status on various land slope in Paranggupito, Wonogiri

Abstract

Soil degradation causes in loss of soil function in supporting living things. The slope of the land has the potential to cause soil degradation. This study aims to provide scientific information on soil degradation status in the form of a map and provide recommendations for improvement based on the determinant factor. Land map units were determined by an overlay of maps: soil type, rainfall, slope, and land use. The research area was divided into 12 LMU, and each was repeated by 3 site samplings. The soil degradation status is known by matching the condition of the soil with the criteria for soil degradation, which refers to the Government Regulation of the Republic of Indonesia Number 150 of 2 000. ANOVA was used to determine the effect of the land slope on the soil degradation status. Correlation analysis is used to know the relationship between the parameters with soil degradation. The result shows that soil degradation status is slightly degraded (R.I) in 6 032.44 ha with different limiting factors. Land slope 16-25% has the highest impact on soil degradation with the determinant parameters were bulk density and a total of porosity. Soil bulk density increases along with increasing steep slope. Efforts to improve the status of soil degradation are by giving organic matter and minimizing soil tillage.