Moderate
Maximum fixation of K occurs:__________?
Correct answer: C. 2:1 clay mineral
- A. 1:1 clay mineral
- B. 1:2 clay mineral
- C. 2:1 clay mineral
- D. 2:2 clay mineral
Explanation
Potassium fixation is greatest in expanding 2:1 clay minerals, especially illite and vermiculite, where K⁺ becomes trapped between mineral layers. The layer structure of 1:1 clays does not provide comparable fixation sites.
Last updated
Practise Soil Science
377 free Soil Science MCQs from Agriculture, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Agriculture questions like this
Agriculture is on this paper prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for it.