Soil erosion by wind removes particles of silt and clay before it removes sand.
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Q20: Clay has greater permeability than sand.
Q21: Healthy topsoil does not have bacteria living
Q22: A lack of water and soil resources
Q23: Actual evapotranspiration is the amount of water
Q24: Potential evapotranspiration is the amount of water
Q26: Sand has high porosity and high permeability.
Q27: Water enters an aquifer through groundwater discharge.
Q28: The R horizon is the most important
Q29: Clay has high porosity and low permeability.
Q30: Loam consists of about 70% sand, 20%
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