Straw mulching improved the quantity of soil microbe and activity of soil microbe.

秸秆覆盖增加了梨园土壤微生物的数量，增强土壤微生物活性。

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Influence of disperse red 3b and its metabolites on catalase activity of soil was investigated.

采用室内试验方法研究了分散红3b及其代谢产物对土壤过氧化氢酶活性的影响。

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It stimulated the activity of soil sucrase to a varying degree, with the maximum stimulation ratio being 15%.

镧对土壤蔗糖酶活性表现出不同程度的刺激作用，最大刺激率达到1 5 %。

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Dr Bowden and his colleagues also hope to understand the impact of thermokarst activity on the structure of the soil, and its nutrient content.

ECONOMIST: Global warming and the permafrost

Soil is, in part, the product of biological activity (all those earthworms, and so on).

ECONOMIST: Spaceflight