Soil Formation Review Question Preview (ID: 48752)
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solid layer of rock beneath the soil
a) humus
b) bedrock
c) topsoil
d) loam
farmers leave dead weeds and stalks of previous years crops to return nutrients to soil
a) contour plowing
b) crop rotation
c) fertility
d) conservation plowing
dark colored substance in soil from decayed organic material
a) humus
b) loam
c) fertility
d) topsoil
measure of how well soil supports plant growth
a) bedrock
b) fertility
c) loam
d) humus
soil thats best for growing most types of plants, made up of clay, sand and silt
a) topsoil
b) bedrock
c) loam
d) humus
crumbly, dark brown mixture of humus clay, and other minerals
a) humus
b) topsoil
c) crop rotation
d) loam
fields plowed along curves of slope to help slow runoff
a) contour plowing
b) humus
c) topsoil
d) crop rotation
farmer plants different crops in a field each year
a) conservation plowing
b) countour plowing
c) crop rotation
d) topsoil
topsoil is the
a) a horizon
b) b horizon
c) c horizon
d)
subsoil is the
a) a horizon
b) b horizon
c) c horizon
d)
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