The horizon of a soil profile which encourages the greatest level of microbial a...
Question
The horizon of a soil profile which encourages the greatest level of microbial activity is
Options
A)
A - horizon
B)
B - horizon
C)
C - horizon
D)
D - horizon
The correct answer is A.
Explanation:
The A-horizon is a weathered layer that contains an accumulation of humus (decomposed, dark-coloured, carbon-rich matter) and microbial biomass that is mixed with small-grained minerals to form aggregate structures.
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