Soil water content also affected soil respiration.

土壤水分对土壤呼吸有一定影响。

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Our results showed that long-term fertilization significantly affected soil archaeal community structure;

研究结果表明， 长期定位施肥明显影响土壤中的古菌组成。

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The results show that acetamiprid obviously affected soil respiration and phosphatase activity, and the higher the concentration was, the stronger the inhibitive effect was.

试验结果表明啶虫脒的施用对土壤呼吸强度和磷酸酶有显著抑制作用，且随施用浓度的增加而抑制作用增强。

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The report says people living near incinerators may be exposed to a range of toxic chemicals, by breathing in contaminated air, eating food which has been contaminated, or by skin contact with affected soil.

BBC: Greenpeace damns incineration 'risks'

It doesn't seem to be affected all that much by climate, soil conditions, geographical location, growth rate, tree size or disease.

NPR: Excerpt: 'A Splintered History Of Wood'