MCQOPTIONS
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| 1. |
When it comes to fertilizing fields, what three nutrients are known as the “secondary nutrients”? |
| A. | Calcium, nitrogen and water |
| B. | Calcium, sulfur and magnesium |
| C. | Nitrogen, phosphorus, potassium |
| D. | Potassium, phosphorus and zinc |
| Answer» C. Nitrogen, phosphorus, potassium | |