Question

Which of the following best describes the concept of 'soil buffering capacity', a property that determines how much lime or acidifying material is needed to bring about a given change in soil pH?

A The soil's ability to retain water against gravity
B The rate at which water infiltrates into the soil surface
C The soil's total nitrogen content
D The soil's resistance to change in pH when an acid or base is added, due to the reserve acidity or alkalinity held on colloidal surfaces
E The soil's bulk density
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