Response of pine forests to acid deposition. I. The soil and assimilation apparatus of trees
Soil chemistry, soil microbial activity, and nutritional status of Scots pine stands located at different distances from pollution sources (a coal-fired power plant and a nitrogen works) were investigated. Based on threshold (critical) values for parameters related to acid-induced effects on soil and needle chemistry, an index of forest degradation (WDL) was constructed. Its values were found to be correlated with soil microbial variables, implying that it may be a good indication of deterioration of forest site caused by acid deposition.
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