Which of the silicate clay minerals would be most and least desired if one were interested in (1) a good foundation for a building, (2) a high cation exchange capacity, (3) an adequate source of potassium, and (4) a soil on which hard clods form after plowing?
If you wanted to find a soil high in kaolinite, where would you go? The same for (1) smectite and (2) vermiculite?
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