So enzyme activities could be used as an index for soil fertilityevaluation of wetlands covered with different vegetation in Yellow River Delta.
三种酶可以作为评价黄河三角洲冲积平原湿地土壤肥力的指标。
2
The results showed that total nitrogen, available nitrogen and organic matter were the main fertility indicators for soil fertilityevaluation in the planted forest land on the Loess Plateau.