Humus Is an Important Soil Colloid

question 11

Multiple Choice

Humus is an important soil colloid.It differs from 2:1 type minerals in all but one of the following characteristics (select the one) .

• A)structural framework of the particles
• B)CEC dependence on soil pH
• C)influence of isomorphous substitution
• D)capable of adsorbing cations
• E)influence on soil aggregate stability

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