Why in News?
Recently, the Indian Council of Agricultural Research (ICAR) recommended the use of ammonium sulphate for paddy cultivation as a cost-effective fertilizer option.
About Ammonium Sulphate
- Ammonium sulphate is an inorganic sulphate salt.
- It is produced by the reaction of:
- Sulfuric acid
- Ammonia
- Chemical Formula:
- (NH₄)₂SO₄
Properties of Ammonium Sulphate
Physical Properties
- White crystalline solid
- Odorless in nature
- High melting point
- Highly soluble in water
Nutrient Composition
Ammonium sulphate contains:
- 21% Nitrogen (N)
- 24% Sulphur (S)
Thus, it acts as an important source of:
- Nitrogen for vegetative growth
- Sulphur for protein synthesis and enzyme activity
Importance in Agriculture
Fertilizer Use
- Widely used as a nitrogen fertilizer.
- Particularly suitable for:
- Alkaline soils
- Sulphur-deficient soils
Benefits for Paddy Cultivation
- Improves crop growth and yield.
- Supplies both nitrogen and sulphur simultaneously.
- Cost-effective alternative to certain other fertilizers.
Sources of Production
Ammonium sulphate is obtained:
- As a byproduct of the steel industry
- Recovered from coke oven gas
- From metallurgical and chemical industries
This enhances industrial waste utilization and resource efficiency.
Applications of Ammonium Sulphate
1. Agriculture
- Used extensively as a fertilizer for crops such as:
- Paddy
- Wheat
- Maize
- Oilseeds
2. Water Treatment
- Used in water purification and treatment processes.
3. Food Industry
- Functions as:
- Food additive
- Dough conditioner
4. Pharmaceutical Industry
- Used in various pharmaceutical processing applications.
5. Textile and Leather Industry
- Utilized in:
- Dyeing
- Printing
- Leather processing
Advantages of Ammonium Sulphate
Dual Nutrient Supply
- Provides both nitrogen and sulphur in a single fertilizer.
Suitable for Alkaline Soils
- Helps reduce soil alkalinity slightly during nitrification.
Affordable Option
- Relatively economical compared to some alternative fertilizers.
Improved Crop Quality
- Sulphur improves:
- Protein formation
- Chlorophyll production
- Overall plant health
Concerns and Limitations
Soil Acidification
- Excessive use may increase soil acidity over time.
Nutrient Imbalance
- Overdependence on chemical fertilizers can degrade soil health.
Environmental Concerns
- Improper fertilizer use may contribute to:
- Water pollution
- Nutrient runoff
- Eutrophication
Significance of ICAR Recommendation
The ICAR recommendation is important because:
- Sulphur deficiency is increasing in Indian soils.
- Farmers require affordable fertilizer alternatives.
- Balanced fertilization is essential for sustainable agriculture and food security.
The move also supports:
- Efficient nutrient management
- Increased agricultural productivity
- Lower cultivation costs
Conclusion
Ammonium sulphate is an important nitrogenous fertilizer with significant agricultural and industrial applications. Its dual nutrient composition makes it particularly beneficial for sulphur-deficient and alkaline soils. However, balanced and scientific usage remains essential to ensure sustainable soil health and long-term agricultural productivity.