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Option 4 : Calcium Carbonate
Concepts:
Fertilizers:
- Fertilizers are chemical substances supplied to crops to increase their productivity.
- The fertilizers contain the essential nutrients required by the plants including Nitrogen, Phosphorus, and Potassium (NPK).
- They enhance the water retention capacity of the soil and increase its fertility.
Types of Fertilizers:
Inorganic Fertilizers
- Inorganic fertilizers refer to the chemical fertilizers that contain nutrient elements for the growth of crops made by chemical means.
- The types of organic fertilizers:
- Nitrogen Fertilizers
- Phosphorus Fertilizers
- Potassium Fertilizers
Organic Fertilizers
- Organic fertilizers refer to the natural fertilizers obtained from plants and animals.
- It enriches the soil with carbonic compounds essential for plant growth.
Explanation:
Ammonium sulphate:
- Ammonium sulfate is an important source of nitrogen, and sulfur for crop nutrition.
- It can be directly used as fertilizer.
Potassium nitrate:
- Potassium nitrate is highly water-soluble nitrogen and potassium fertilizer.
- It is commonly used as fertilizer for high-value crops.
- It helps to maintain the healthy growth of flowers.
Calcium Superphosphate:
- Superphosphate is 1st chemical fertilizer.
- Calcium Superphosphate is an important source of phosphorus for crop nutrition.
Calcium Carbonate:
- Calcium Carbonate is sometimes used as fertilizer for agricultural soils.
- It has a role as an antacid, a food colouring agent.
- It is taken as a dietary supplement with food, so it is not poisonous.
Therefore, from the above discussion, Calcium Carbonate is not used as a fertilizer.
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