Macronutrients - Nitogen, carbon
Micronutrients - Zinc , molybdenum.
Micronutrients : These are present in amount less than 10m mole kg-1.
Role of copper :
Copper is absorbed as cupric ions (Cu2+). It is essential for the overall metabolism in plants. It is associated with certain enzymes involved in redox reactions.
1. Boron is involved in pollen germination and cell elongation, cell differentiation.
2. It is required in the translocation of scarbohydrates.
3. It is required for the uptake of Calcium ions.
4. It helps in membrane functioning.