Q1 granular or blocky describes a soil's:
texture
profile
chemistry
structure
q2 red soils are usually high in:
iron
humus
calcium carbonate
salt
q3 the soil horizons from the surface down on a well-developed and undisturbed soil are:
o, a, e, b, c
a, b, c, e, o
a, b, o, c, e
o, a, b, e, c
q4 the soil horizon rich in both mineral and organic matter is the:
a
b
c
o