Journal of the Japanese Society of Soil Physics
Online ISSN : 2435-2497
Print ISSN : 0387-6012
Soil Erosion on Differently Shaped Farm Fields of Decomposed Granite Soil
Yasuo Matsumoto
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1992 Volume 64 Pages 27-35

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Abstract
Actual soil erosion and conservation practices were observed over two years on two differently shaped farm fields which had been reclaimed into two types, one had a slightly graded side, the other had two graded sides, but the same slope gradient and the same soil of decomposed granite. The field observations showed that soil erosion occurred along the flow ends of furrows in a field and that soil loss was decreased after proper conservation practices leading the flow to a stable waterway directly. On the fields of the two graded sides type, however, furrow erosion was accelerated by ridging and so conservation practices became harder because the flow was obstructed by sedimentation and thick sod along a waterway. Sustainable agriculture in reclaimed land of decomposed granite soil needs feasible conservation practices and stable fields easy to control soil erosion year by year. From these viewpoints, farm fields with a slightly graded side are suggested to be superior to the others.
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© 1992 Japanese Society of Soil Physics
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