Question

Which nutrient is not supplied to crops via fertilizer?

• A. Phosphorus
• B. Potassium
• C. Iron
• D. Nitrogen

Answer 1

The correct option is C Iron

Nitrogen, potassium, and phosphorus are required for the growth of plants in more amounts. These nutrients are absorbed in the form of salts from the soil. However, when the supply from soil is inadequate they are added as fertilizers. Iron is obtained from the soil in sufficient amounts as per the requirement of the plants. So, they are generally not added as the fertilizers. However, there are iron fertilizers which can be added when the soil is deficient in iron.

Thus, the correct answer is option C.