Thermal insulation, leading to greater deposition of dew. In addition organic mulches also contribute to:
Correct answer: C. All of the above
- A. Enhanced humification and microbial activity leading to higher nutrient availability
- B. Improvement of soil structure, by incorporation of plant residues and by encouraging soil fauna.
- C. All of the above
- D. Even in more humid climates it may have very beneficial effects with certain species, e.g., the poplar
- E. Mulching is of profound importance in dry regions
Explanation
Besides insulating the soil and increasing dew deposition, organic mulch decomposes into humus, stimulates microbes and soil fauna, and improves soil structure. Mulching is especially valuable in dry regions, although species such as poplar may also benefit in humid climates.
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