Deep black soil is productive due to a high proportion of
Correct answer: C. clay and humus
- A. sand and zinc
- B. gravel and calcium
- C. clay and humus
- D. silt and earthworm.
Explanation
Deep black soil is productive due to a high proportion of clay and humus. The organic matter present in the soil is contributed by the death and decay of living organisms. These are the richest in nutrients and therefore these soils are the most fertile.
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Ecosystems include biotic and abiotic components, food chains and webs, energy flow, nutrient cycles, populations and ecological relationships. Pollution and conservation cover air, water, soil and noise pollution, their effects on organisms, biodiversity loss, protected areas, sustainable resource use and methods for reducing environmental damage.
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