A) 3. 4 ? 5. 4
B) 6.5 ? 7.5
C) 4.5 ? 8.5
D) 5.5 ? 6.5
Correct Answer: C
Solution :
Most cultivated soils have a pH range between 4.5 and 8.5. However most plants grow best in soils with a neutral or slightly acidic pH.
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