(i) Increase microbial activities in the soil
(ii) Improve soil structure/aeration/water infiltration/water retention
(iii) Reduce effects of water and wind erosion
(iv) Less expensive per given unit of nutrient content
(v) Impart dark colour to the soil which improves ability of soil to absorb heat.
(vi) Buffers and moderates soil pH by preventing rapid chemical change
john3 answered the question on January 9, 2018 at 15:06
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