题目内容

The physical weathering, chemical weathering and biological weathering are present at the same time for a specific region, but with different intensities.

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In agricultural soil, its natural fertility and artificial fertility is combined together closely. It is impossible to tell natural fertility from artificial fertility in such soils.

Soil age refers to the length of time for soil development. Soil age is usually divided into absolute age and relative age.

The soil active acids are abundant in the rhizosphere, so the activity of microorganisms in the rhizosphere is high.

The soil water characteristic curves of water desorption & absorption are coincident.

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