FORESTRY
SOIL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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soil
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rocks
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organic matter
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None of the above
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Detailed explanation-1: -Humus is dark, organic material that forms in soil when plant and animal matter decays.
Detailed explanation-2: -decay of organic matter or putrefaction, process whereby heterotrophic organisms, including some bacteria, fungi, saprophytic plants, and lower animals, utilize the remains of once-living tissue as a source of nutrition.
Detailed explanation-3: -One suitable definition of organic matter is biological material in the process of decaying or decomposing, such as humus. A closer look at the biological material in the process of decaying reveals so-called organic compounds (biological molecules) in the process of breaking up (disintegrating).
Detailed explanation-4: -Soil organic matter (SOM) is formed through the partial decomposition and transformation of plant inputs (for example, above-and below-ground litter and exudates) by soil organisms.