in Plant Nutrition (Mineral Nutrition in Plants) by

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  1. Carbon, hydrogen and oxygen are indispensable for the plant growth.
  2. They constitute about 94% of the total dry weight of the plant.
  3. Carbon is obtained from the atmosphere as CO2.
  4. Oxygen is obtained from air or water.
  5. Hydrogen is obtained from water.
  6. They form the structural elements (framework elements).
  7. They are essential for carbohydrate and fat synthesis.
  8. They are the chief constituents of the cell wall and protoplasm.
  9. Their deficiency may lead to poor or stunted growth of the plant.
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