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Name the essential elements :


 There are 17 essential elements. These are C, H, O, N, S, P, K, Ca, Mg, Fe, Cu, B, Zn, Mn, Mo, Cl and Ni.
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Explain chlorosis and give its cause. Describe the role of copper.

Chlorosis is the condition in which green plants turn yellow. It is caused by the deficiency of elents like N, K, Mg, S, Fe, Mn, Zn and Mo.

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. 

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What is the importance of boron in plant life ?

Importance of boron :

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. 

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Name two Macro and micro nutrients

Macronutrients - Nitogen, carbon

Micronutrients - Zinc , molybdenum. 

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In what amount macronutrients and micronutrients are required.

Macronutrients : are present in amount more than 10m mole kg.–1 of dry mattter.

Micronutrients : These are present in amount less than 10m mole kg-1.

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