Which of the following correctly describes humus?
A) the layer of freshly fallen leaves
B) microorganisms that are poisonous to soil
C) partially decomposed organic matter
D) the light coloured or nearly white layer

Question

Which of the following correctly describes humus? 
A) the layer of freshly fallen leaves 
B) microorganisms that are poisonous to soil 
C) partially decomposed organic matter 
D) the light coloured or nearly white layer

Quizplus · Accepted Answer

Humus is the partially decomposed organic matter that is present in soil. It is formed from the breakdown of dead plant and animal material by microorganisms. It is a crucial component of soil fertility and is responsible for the dark color of soil. A) is incorrect since the layer of freshly fallen leaves is not the same as humus. B) is incorrect since microorganisms in soil are not typically poisonous but may be beneficial. D) is incorrect as the light colored layer at the top of soil is typically the result of weathering or erosion.

Which of the Following Correctly Describes Humus