PENENTUAN LAJU EROSI PADA TANAH ANDEPTS MENGGUNAKAN TANAMAN KACANG TANAH DAN TERAS BANGKU DENGAN METODE USLE DAN PETAK KECIL DI LAHAN KWALA BEKALA UNIVERSITAS SUMATERA UTARA

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ABSTRACT: The  way  to  prevent  the  broken  soil  (erosion)  can  be  using  vegetation  methods  (plants)    and  mechanical  methods (terrace). This study was aimed to determine tolerable erosion rate and Erosion Hazard Level (TBE) the Andepts soil erosion using peanuts and bench terrace with slope of 9%, in April-July 2014 in the District Kwala Bekala using small plots and USLE predictions.The results showed that the amount of erosion using small plots for control land were 1,79 ton/(ha.year), on peanuts land were 1,18 ton/(ha.year), on bench terrace land were 0,62 ton/(ha.year) respectively with low Erosion Hasard Level (TBE) category. USLE predictions based on 10 years of rainfall data for control land were 49,34 ton/(ha.year), on peanuts land were 9,86 ton/(ha.year), on bench terrace land were 17,27 ton/(ha.year) respectively with Erosion Hazard Level (TBE) category of low to moderate. Predictions based on the USLE 4 months rainfall data for control  land  were  6,28  ton/(ha.year),  on  peanuts  land  were  1,25  ton/(ha.year),  on  bench  terrace  land  were  2,19 ton/(ha.year) respectively with low Erosion Hazard Level (TBE) category. The amount of tolerable erosion rate is 29 tons/(ha.years).
Keywords: Andepts Soil, Bench Terrace, Erosion, Peanuts
Penulis: Rifki Iqromi Purba, Sumono, Nazif Ichwan
Kode Jurnal: jppertaniandd150040

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Jp Pertanian dd 2015