题目内容

Total alkalinity refers to the total amount of carbonate and bicarbonate in soil solution or irrigation water.

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The amount of active acid in the soil is far greater than that of potential acid.

The content and composition of each component in the soil solution vary with soil type, soil layer and season.

Soil solution refers to the aqueous solution in the soil, excluding the gas and solute contained therein.

The redox potential decreases with increasing pH under certain conditions.