题目内容

Which of the following are the sources of soil acids?

Activation of aluminum in soil
B. Dissociation of carbonic acid
C. Dissociation of organic acids
Dissociation of water

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The soil solution is a form conversion agent for nutrient elements.

Which of the following cation can replace the silicon ion in the silicon-oxygen tetrahedron?

Al3+
B. O2-
C. H+
D. Ca2+

The electric double layer of soil colloid includes potential-determining ion layer and ______ .

In cation exchange, the higher the cation valence, the higher the exchange ability. Therefore, the mono-valent cations in solution cannot exchange with the bivalent or trivalent cations on the colloid surface in any cases.