Chapter 9
A-Horizon
A layer of soil also called topsoil, lots of soil organisms and organic material.
Agriculture
practice raising crops or livestock for human consumption.
Alfisols
soils that are typical of temperate deciduous forests.
Ardisols
soils that are typical of deserts, high in nutrient, little organic material
B-horizon
layer of soil that is also called subsoil, beneath the topsoil
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