Water, Rain is what agent of erosion?, Bhorizon, Another name for Subsoil., Chorizon, Another name for parent material., Decomposers, Breaks down dead matter., Ice, Glaciers are what agent of erosion?, Gravity, Landslides are what agent of erosion?, Humus, Soil with this has a darker color., Ohorizon, The horizon with organic litter., Water, Soils with more sand allow what to pass through?, Chemical, Acid rain is which type of weathering?, Rhorizon, Another name for the bedrock layer., Earthworms, They mix the humus with soil., Animals, What helps aerate the soil?, Ahorizon, Another name for Topsoil., Mechanical, The agents of erosion are what type of weathering?, Fertile, What is it called when soil is usable?, Hundreds, About how many years does it take for soil to form?, Loam, What is the best type of soil?, CropRotation, What way of farming gives nutrients back to the soil?.

Soil Study Guide

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