soil water-extract acidity [土壤] 土壤水浸出液酸度
The organic contents of fertilized soil increased by the research of soil water extract.
通过对玉米残体培肥后土壤水浸提液的研究可知，培肥后土壤有机质的含量增加。
The study on the constitute change of the concentration of soil water extract had great significance to research on the soil mechanism of fertilizing undecomposed corn.
土壤浸提液浓缩过程中物质成分变化的研究，认识玉米残体培肥土壤的机制也有重要意义。
As soil water extract contains much water-soluble organic selenium and organic matter, the determination of soil water-soluble selenium should be concentrated and digested beforehand.
由于水溶性有机态硒及有机质的存在，准确测定土壤水溶性硒宜经浓缩、消化处理后进行。
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