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Soil Horizons Identification

APES-FTFUYG

"Soil Horizons." Soil Horizons. NESoil, n.d. Web. 01 Apr. 2016. http://www.nesoil.com/properties/horizons/index.htm.

Correctly identify the soil horizons in order from 1 to 4.

A

A-O-B-C.

B

O-A-B-C.

C

A-B-C-O.

D

E-A-B-C.

E

A-B-C-E.