English Language · English
Based on historical developments in agriculture, consider the following statements: A. Initially, farmers tried to improve soils by grinding naturally occurring phosphate pebbles, but much of the phosphorus in them remained unavailable to plants. B. About two centuries ago, scientists learned to make phosphate more accessible by chemically altering its structure with acid treatment. C. From the outset, phosphate-rich rocks were fully soluble and required no processing before being used as effective fertilisers. Which of the statements given above are correct?
- 1A, B and C
- 2Only B and C
- 3Only A and C
- 4Only A and B✓
Correct answer
Only A and B
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