Kajian Tingkat Bahaya Erosi (TBE) Tanah Andepts pada Pengunaan Lahan Tanaman Kacang Tanah di Kebun percobaan Kwala Bekala USU

Abstract

DELIMA LAILAN SARI NASUTION: The Study of Erosion Hazard Level (TBE) of Andepts Soil on Peanut Cultivation at Kwala Bekala Research Field University of North Sumatra, supervised by SUMONO and EDI SUSANTO. Land with a high slope will increase landslide potential if converted into agriculture field without conservation. Therefore, research was carried out at peanut crop area with 15,5 percent landslope during Mei to August 2010 using the USLE and small square methods. The observed parameters were the kind of soil, the effective depth of soil, soil permeability, soil C-organic content, soil texture, soil structure, slope and rainfall. The results showed that the grades of erosion using USLE methods was 103,99 ton/(ha.year) and the average of erosion that occurred according small square methods was 56,52 ton/(ha.year) that was smaller than the USLE method.