Regarding soil and organic matter in humus,which of the following statements is true?
A)Humus is composed of inorganic nutrients,and organic matter is composed only of organic matter.
B)Soil organic matter is completely decayed.
C)Completely decayed soil organic matter is called humus.
D)Eventually,the nutrients in soil organic matter are converted to organic form.

Question

Quizplus · Accepted Answer

Humus is the dark, organic substance that remains after plant and animal residues have decomposed. It is formed from the decay of soil organic matter and is what gives healthy soil its characteristic dark color. Therefore, option C is correct that completely decayed soil organic matter is called humus. Option A is incorrect because humus is composed of organic matter, not inorganic nutrients. Option B is incorrect because soil organic matter is not completely decayed—it is the precursor to humus. Option D is also incorrect because the nutrients in humus are already in organic form, as they are a result of the decomposition of organic matter.

Regarding Soil and Organic Matter in Humus,which of the Following