Clay mineral compositions are one of important factors that influencing the chemical and physical characteristics of soils in the arid regions.

在干旱地区土壤中的粘粒矿物组成是影响土壤物理和化学特性的重要因素之一。

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The availability of mineral nutrients for plants is determined by the chemical, physical and biological characteristics of soils, especially by root-induced changes in the rhizosphere.

养分的有效性是由土壤物理、化学和生物学特性，特别是根系主导的根际动态过程所决定的。

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The phosphorus characteristics and loss risk assessment of vegetable garden soils in the suburbs of Guangzhou city were studied by chemical analyses and leaching experiment.

通过化学分析和土壤淋洗试验对广州城郊菜地土壤磷素特征和流失风险进行了研究和分析。

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