Mature soil generally has three horizons. Label the soil horizons A, B, and C in the following picture. In addition, describe the contents of the horizons by labeling D through G. 
D. ________E. ________F. ________G. ________
What will be an ideal response?
Soil horizon A is the uppermost or topsoil layer. The B horizon is under A and the C horizon is a weathered rock layer under B.
D. Topsoil: contains litter and humus
E. Zone of leaching: removal of nutrients
F. Subsoil: accumulation of minerals and some organic material
G. Weathered or shattered rock
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