PENENTUAN LAJU EROSI PADA TANAH ANDEPTS MENGGUNAKAN TANAMAN JAGUNG DAN TERAS BANGKU DENGAN METODE USLE DAN PETAK KECIL DI LAHAN KWALA BEKALA UNIVERSITAS SUMATERA UTARA
ABSTRAK: The way to prevent
the soil erosion is using vegetation method (plants) and mechanical method
(terrace). This study was aimed to determine tolerable erosion rate and Erosion
Hazard Level (TBE) on Andepts soil using
corn and bench terrace (inward) with
slope of 9%, in April-July 2014 in the District of Kwala Bekala using small plots and USLE
predictions. The results showed that the amount of erosion using small plots
for control land was 1,79 ton/(ha.year), on corn land was 1,67 ton/(ha.year),
and on bench terrace (inward) land was 0,44 ton/(ha.year), respectively with
low Erosion Hasard Level (TBE) category. USLE predictions based on 10 years of
rainfall data for control land was 49,34 ton/(ha.year), on corn land was 31,34
ton/(ha.year), and on bench terrace (inward) was 17,27 ton/(ha.year) with
Erosion Hazard Level (TBE) category
of low to
moderate. Prediction based
on the USLE
for 4 months
rainfall data for
control land was
6,28 ton/(ha.year), on corn land was 4,003 ton/(ha.year), and on bench
terrace (inward) land was 2,19 ton/(ha.year) with low Erosion Hazard Level
(TBE) category. The amount of tolerable erosion rate was 29 tons/(ha.years).
Penulis: Rian Hidayat Lubis,
Sumono, Lukman Adlin Harahap
Kode Jurnal: jppertaniandd150039
