Acid soil contain pH____________________?
Correct answer: A. <7
- A. <7
- B. >7
- C. >7.0
- D. 8.5
Explanation
A soil is classified as acidic when its pH is below 7, because hydrogen-ion activity exceeds hydroxyl-ion activity. Values above 7 indicate alkaline soil, while pH 8.5 is only one particular alkaline value.
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