| dc.description.abstract | RIAN HIDAYAT LUBIS: The determination of Erosion Rate on Andepts Soil
Using Corns Plants and Bench Terrace With USLE Methods and Small Plots in
Kwala Bekala Estate University of North Sumatera, supervised by SUMONO and
LUKMAN ADLIN HARAHAP.
The way to prevent the soil degradation (erosion) is using vegetation
methods (plants) and mechanical methods (terrace). This study was aimed to
determine tolerable erosion rate and Erosion Hazard Level (TBE) on Andepts soil
using corns plants and bench terrace 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 corns land was 1,67 ton/(ha.year), and on bench
terrace 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 corns land was 31,34 ton/(ha.year), and on
bench terrace land was 17,27 ton/(ha.year) respectively with Erosion Hazard
Level (TBE) category of low to moderate. Predictions based on the USLE for 4
months rainfall data for control land was 6,28 ton/(ha.year), on corns land was
4,003 ton/(ha.year), and on bench terrace land was 2,19 ton/(ha.year)
respectively with low Erosion Hazard Level (TBE) category. The amount of
tolerable erosion rate was 29 tons/(ha.years). | en_US |
