Question

Distinguish between micronutrients and macronutrients. Give suitable example

Answer 1

Answer:

• Explanation:

• Macronutrients are required in large quantity.whereas micronutrients are required in less quantity.

• concentration of each macronutrient is more than 1mg/gm of dry matter.whereas concentration of micronutrients is less than 1mg/gm of dry matter.

• Macronutrients take part in building plant body and different protoplasmic structure.whereas micronutrients have no such function.

• Example of macronutrients-nitrogen,phosphorus,sulphur etc.

        example of micronutrients is iron,boron,zinc.manganese etc.

Answer 2

Answer:

Micronutrients

• Micronutrients form minor portion of dry weight of a plant.
• They are required in minute quantities i.e., less than 10 m mole/kg of dry matter
• Most of them act as activators for enzymes, e.g., Manganese, Zinc, Boron etc.
• These are called trace elements.

Macronutrients

• Macronutrients form major portion of dry weight of a plant.
• They are required in relatively large quantities i.e., in excess of 10 mmole kg-1 of dry matter
• They enter into the structure of macromolecules of the cell, e.g., Carbon, Hydrogen and Nitrogen etc.
• These are called major elements.