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Effect of different engineering soil conservation measures on water and sediment yield and farm productivity



Effect of different engineering soil conservation measures on water and sediment yield and farm productivity



Pakistan Journal of Forestry 44(2): 82-91



An experiment was laid out at Pabbi forest Kharian to find out the suitable soil conservation measure for soil and water conservation enhancement of farm productivity. Four catchments were treated one each with strip cropping, conservation benches with planting of trees on slopes, conservation benches with natural grass on slopes and bench terraces. On the risers of bench terraces and conservation benches ipil ipil was planted. In strip cropping Eucalyptus camaldulensis, Acacia modesta and L. leucocephalla were planted in 3 rows at 1 times 1 m spacing along the contour. At the outlet of each catchment, detension dams with circular splitter and siltation tanks for monitoring water and sediment yield were constructed. The water and sediment yield data showed that there was no surface runoff and sediment yield from the catchment treated with bench terraces, while it was maximum from the catchment treated with only strip cropping. There was no significant difference in water and sediment yield from the other two catchments treated with conservation benches with trees and grasses on slopes respectively. The crop, forage, and the biomass production of Ipil ipil data showed that maximum farm productivity is from the catchment treated with bench terraces. Ipil ipil on the risers of the terraces was found to be most fruitful not only for increasing the fertility of soil and stability of risers but also for increasing the farm income by production of fuel wood and fodder from the riser of bench terraces. Therefore, bench terraces were found to the most suitable soil conservation measure for soil and water conservation and increasing the farm productivity in the scrub zone.

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