The major portion of the dry weight of plants comprises of

Nitrogen, phosphorus and potassium

Calcium, magnesium and hydrogen

Carbon, nitrogen and hydrogen

Carbon, hydrogen and oxygen

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Major elements or macro nutrients are the elements, which are required in large amounts and form the plant body constituents. The major elements include carbon, hydrogen, oxygen, nitrogen, phosphorus, potassium, calcium, magnesium and sulphur.

These elements form an integral part of complex organic molecules of plants. Carbon, hydrogen and oxygen are important minerals, which form the cellulose (carbohydrate) framework of the plants.

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