Weegy: Soil is made of air, water, organic material, minerals, and weathered rock.
User: Which soil horizon is located closest to the earth's crust?
O horizon
A horizon
B horizon
C horizon
Weegy: The C horizon is located closest to the Earth's crust.
User: How are the O and A horizons similar?
They both contain organic material.
They are both found below the B horizon.
They are both very dense layers of soil.
They are both part of the subsoil layer.
Weegy: The O and A horizons are similar in that: They both contain organic material (humus).
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