soil quality degradation index 土壤质量退化指数
Through field investigation and soil fertility index analysis, causes and mechanism of fertility degradation of black soil in the Songliao Plain were explored.
通过田间调查和土壤肥力指标分析，探讨了松辽平原玉米带黑土肥力退化的原因和机理。
Through analyzing the degradation index, this paper monitored and evaluated the black soil degradation in Dehui city.
本文通过对黑土退化指标进行分析，对吉林省德惠市的黑土退化进行监测与评价。
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