砂岩发育的土壤主导因子是土层厚度、非毛管孔隙度和腐殖质层厚度。
The major factors of the soil developed from arenite were soil-layer depth, non-capillary porosity and humus depth.
本文应用灰色系统理论—灰色关联识别原理和方法，探讨干旱区土壤生态系统的主导因子识别。
The leading factors of soil ecosystem in arid area are discussed based an the application of the principle and method of grey relational gradation, the important part of grey system theory.
在现有灌溉条件下，土壤质量是制约生产力的主导因子。
Under the irrigation conditions at present, the main limited factor of productivity is soil quality.
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