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What is Contour Hedgerow System?

This system is the planting of hedgerows with leguminous tree and other plant species along the contour of sloping lands to provide vegetative barriers to soil erosion while contributing green manure to cash crops grown in the alley-strips. Along the edges usually used are Leucaena (Ipil-ipil) and Gliricidia (Kakawate). These vegetative barriers reduce the length of slope of the land, thus reducing run-off velocity.