EVALUASI LAJU EROSI PADA BEBERAPA KEMIRINGAN TANAH ULTISOL PADA TANAMAN KACANG TANAH DENGAN METODE PETAK KECIL DAN USLE DI KECAMATAN SIBORONGBORONG KABUPATEN TAPANULI UTARA
ABSTRACT: Cultivation of
crops on sloping
land is vulnerable
to erosion if
no soil and
water conservation measures
applied. This study was aim to
quantify the erosion, determining the tolerable rate of erosion, and the
erosion rate (TBE) in the Ultisol soil on slopes: 9%, 19%, and 32%
plantedwith peanuts, using small plots
and USLE predictions on July-October 2012 in the District
Siborongborong. The results
showed that the
amount of erosion
that occurs for
USLE prediction method based
on 12 years
of rainfall data
for the slopes
of 9%, 19%,
32%, were 20.91,
69.43, and 166.47
tons/ha.year respectively, with moderate to very high TBE category. USLE
prediction method based on rainfall data for four months of study with 9%, 19%,
32% slopes, were 0.4, 1.2,and 2.9 ton/ha.year respectively with low TBE
category. Small methods plots for slopes
of 9% 19%,
32%, were 12.36,
12.54, and 0.63
tons/ha year respectively
with low TBE
category. The magnitude of the
tolerable rate of erosion at 17:17 tonnes/ha.year (17.17 mm/ha.year).
Key words: Erosion, Ultisol
land, Peanut Plant, Siborongborong
Penulis: Agri Dayanti Sipayung,
Sumono, Lukman Adlin Harahap
Kode Jurnal: jppertaniandd130148
