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
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).
Penulis: Rifki Iqromi Purba,
Sumono, Nazif Ichwan
Kode Jurnal: jppertaniandd150040
