Following with the exhaust test, the content of soil phosphorus storage of each treatment showed a declining tendency.
随着耗竭试验的继续，各处理土壤磷库含量都呈下降趋势。
The validity and availability of phosphorus in sandy soil was systematically studied using chemical analysis, bio - adsorption test and biological diagnoses.
应用化学分析、吸附试验和生物诊断方法，系统研究了风沙土磷的有效性和利用率。
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