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Role of Microorganisms in Carbon Cycling in Soils 157<br />

Weixin C, Ross AV (1993) Measurement of microbial biomass in arctic tundra soils using<br />

fumigation-extraction and substrate-induced respiration procedures. Soil Biol Biochem<br />

25:135–141<br />

Wirth SJ (1999) Soil microbial properties across an encatchment in the moraine, agricultural<br />

landscape of Northeast Germany. Geomicrobiol J 16:207–219<br />

Zak DR, Pregitzer KS, King JS, Holmes WE (2000) Elevated atmospheric CO2, fineroots<br />

and the response of soil microorganisms: a review and hypothesis. New Phytologist<br />

147:201–222<br />

Zeller V, Bardgett RD, Tappeiner U (2001) Site and management effects on soil microbial<br />

properties of subalpine meadows: a study of land abandonment along a north-south<br />

gradient in the European Alps. Soil Biol Biochem 33:639–649

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