You are working with a soil colloid known to have a reasonably high potassium level,a cation exchange capacity of about 20 cmol_c/kg of clay and little tendency to swell when wetted.Which of the following is it most apt to be the dominant clay mineral in this soil? A)vermiculite B)smectite C)kaolinite D)humus E)fine-grained mica

Question

Quizplus · Accepted Answer

Fine-grained mica, such as illite, is known for its relatively high potassium content and moderate cation exchange capacity (CEC) around the value given, without significant swelling upon wetting, which aligns with the characteristics described.

You Are Working with a Soil Colloid Known to Have