Earthworms can be so common in soil that a single acre (0.4 ha.) may contain one million of them.
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Q102: Regolith is the loose, inorganic material overlying
Q103: In the long run, temperature and moisture
Q104: Soil is considered to include dead and
Q105: The presence of humus in the soil
Q106: In the soil, the C horizon is
Q108: Organic material generally comprises less than 5%
Q109: Ultisols generally lack _.
A) clay
B) iron
C) humus
D)
Q110: An Alfisol is most closely related to
Q111: The most weathered and leached of all
Q112: Humus eventually becomes litter.
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