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Hydrophobic surfaces. --- Soil absorption and adsorption --- Soil conservation --- Soil management
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Humus --- Humification --- Soil erosion --- Soil conservation --- United States.
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Sedimentation and deposition --- Sediment control --- Soils --- Composition. --- United States.
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Crust vegetation --- Soil crusting --- Soil microbiology --- Soil ecology --- United States, West.
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Humus --- Humification --- Range management --- Soil management --- United States.
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Pastures --- Soils --- Soil conservation --- Quality --- United States.
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Pastures --- Soils --- Soil conservation --- Quality --- United States.
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Soil structure --- Soils --- Soil erosion --- Quality
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