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(1) Potassium:-It is present mostly in growing regions. It
helps to synthesize the carbohydrates and proteins. In its
absence leaves lose their colour and
Gradually wither.
(2)Calcium:- Occurs in cell wall. It promotes the growth of
plant. In its absence plant become stunted.
(3)Magnesium :-In the absence of magnesium chlorophyll is
not formed.
(4)Iron:-It is present in protoplasm associated with
plastids, Chlorophyll is not formed in its absence.
(5)Carbon:- It is the main elements in the plant body. It id
absorbed from atmosphere as carbon dioxide. There is regular
Circulation of CO2 and oxygen between green plants and
atmosphere.
(6)Nitrogen:- It id essential for growth.
In its absence leave become
yellowish. It is important constituent of protein,
Chlorophyll, and protoplasm
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