Question

To the plant , soil is not the source of :

• A. N
• B. K
• C. Fe
• D. H

Answer 1

The correct option is D H

• Soil is a major source of nutrients needed by plants for growth. The three main nutrients are nitrogen (N), phosphorus (P) and potassium (K). Together they make up the trio known as NPK.
• Other important nutrients are calcium, magnesium, and sulfur. It is also a source of iron for the plants. However, water is the source of hydrogen for the plants which is absorbed from the soil and transported throughout the plant via the phloem tissue.

So the correct option is 'Hydrogen'.