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Questions and Answers
What is the main source of the biotic material in the soil?
What is the main source of the biotic material in the soil?
- Deposition of dust and debris
- Decomposition of rocks and minerals
- Accumulation of chemical fertilizers
- Decomposition of the remains of plants and animals (correct)
What is the role of microorganisms and other organisms in the soil?
What is the role of microorganisms and other organisms in the soil?
- They produce chemical fertilizers
- They help to decompose the dead organic materials (correct)
- They compete with plants for resources
- They help to deplete the soil nutrients
How does the proportion of humus in the soil affect its fertility?
How does the proportion of humus in the soil affect its fertility?
- Humus makes the soil less fertile
- If the proportion of humus is greater, the soils become fertile (correct)
- Humus decreases the soil fertility
- Humus has no effect on soil fertility
What is the relationship between climate and the rate of soil formation?
What is the relationship between climate and the rate of soil formation?
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How does the use of chemical fertilizers and insecticides affect the soil?
How does the use of chemical fertilizers and insecticides affect the soil?
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