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Sedimentation studies were made between 1958 and 1969 on stock water reservoirs to determine sediment yields from rangeland watersheds on two soil textural groups of western South Dakota. Watersheds having fine-textured soils had a mean annual sediment yield of 3.47 tons per acre, while watersheds with medium-textured soils had a mean annual sediment yield of 1.03 tons per acre. The average sediment volume-weight was 62 and 81 lb/ft3 for the reservoirs on watersheds with fine-and medium-textured soils, respectively.

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