Nutrients required by Plants for Growth
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Crops obtain most of their carbon and oxygen from the air. Hydrogen is obtained from soil water. Carbon dioxide is especially important for plant growth. It is taken up by the plant from air through pores in the green leaves and combines with hydrogen from soil water, to form carbohydrate and other plant substances by energy from sunlight. This process is knows as photosynthesis. Out of the 13 nutrients taken from the soil, Nitrogen, Phosphorus and Potassium are used in large quantities and hence known as primary nutrients. Calcium, Magnesium and Sulphur are needed in moderate to small quantities but they play an important role in formation of plant tissues. These are known as secondary nutrients. The remaining are needed in very small quantities and are known as micro-nutrients. Plants need 16 elements to grow. They get these from air, water and soil.
| Type | Nutrients | Source |
|---|---|---|
| Macro-nutrient | Carbon | Air & Water |
| Macro-nutrient | Hydrogen | Air & Water |
| Macro-nutrient | Oxygen | Air & Water |
| Macro-nutrient | Nitrogen | Soil |
| Macro-nutrient | Phosphorus | Soil |
| Macro-nutrient | Potassium | Soil |
| Micro-nutrient | Calcium | Skeleton Elements |
| Micro-nutrient | Magnesium | Fertilizers and Manures |
| Micro-nutrient | Sulphur | Fertilizers and Manures |
| Micro-nutrient | Iron | Fertilizers and Manures |
| Micro-nutrient | Manganese | Fertilizers and Manures |
| Micro-nutrient | Boron | Fertilizers and Manures |
| Micro-nutrient | Zinc | Fertilizers and Manures |
| Micro-nutrient | Copper | Fertilizers and Manures |
| Micro-nutrient | Molybdenum | Fertilizers and Manures |
| Micro-nutrient | Chlorine | Fertilizers and Manures |
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