Analysis of Fertilizer And Vermi Compost Samples
| 1 | Moisture | Gravimetric Method |
|---|---|---|
| 2 | Particle size | Manually |
| 3 | Manually | Kjeldahl Method |
| 4 | Kjeldahl Method | Adding Devarda’s Alloy |
| 5 | Total P | Spectrophotometer or Colorimetric Method |
| 6 | Total K | Flame Photometer (Toth and Prince, 1949) |
| 7 | Total S | Precipitation Method |
| 8 | Calcium | EDTA Titration Method |
| 9 | Magnesium | EDTA Titration Method |
| 10 | Boron | Azomethine-H Colorimetric Method |
| 11 | Micronutrients – Total Zn, Cu, Fe, and Mn | Atomic Absorption Spectroscopy |
SLN Group Fertilizer and Vermicompost Analysis Facility
SLN Group offers specialized laboratory services for the analysis of chemical fertilizers and vermicompost samples. These services help manufacturers, farmers and agribusiness companies verify nutrient content, quality standards and product effectiveness. Accurate testing ensures correct labeling, regulatory compliance and efficient nutrient management for crops.
The laboratory follows standardized analytical protocols using advanced instruments and validated methods to maintain accuracy and reliability.
Scope of Analysis
SLN Group analyzes the following parameters in fertilizer and vermicompost samples
Physical Parameters
- Moisture content
- Particle size
Primary Nutrients
- Total Nitrogen
- Total Phosphorus
- Total Potassium
Secondary Nutrients
- Sulphur
- Calcium
- Magnesium
Micronutrients
- Zinc
- Copper
- Iron
- Manganese
- Boron
Sample Preparation
Moisture Estimation
- Method used Gravimetric Method
- Sample weighed before drying
- Dried at controlled temperature
- Reweighed after drying
- Moisture percentage calculated
Particle Size Analysis
- Method used Manual sieving
- Determines uniformity of granules or compost texture
- Important for application efficiencyc
Analytical Methods Used
1. Total Nitrogen
- Method used Kjeldahl Method
- Digestion of sample using acid
- Distillation and titration performed
- Devarda’s alloy added for nitrate reduction
- Measures total nitrogen accurately
2. Total Phosphorus
- Method used Spectrophotometer or Colorimetric Method
- Color development proportional to phosphorus concentration
- Absorbance measured
- Indicates phosphorus availability
3. Total Potassium
- Method used Flame Photometer
- Reference Toth and Prince 1949
- Measures potassium emission intensity
- Determines potassium concentration
4. Total Sulphur
- Method used Precipitation Method
- Sulphur converted to insoluble form
- Quantified gravimetrically
5. Calcium Estimation
- Method used EDTA Titration Method
- Chelometric titration technique
- Measures calcium concentration
6. Magnesium Estimation
- Method used EDTA Titration Method
- Determines magnesium content
7. Boron Estimation
- Method used Azomethine H Colorimetric Method
- Color intensity proportional to boron content
- Measured using spectrophotometer
8. Micronutrient Analysis
Zinc Copper Iron Manganese
- Method used Atomic Absorption Spectroscopy
- Highly sensitive analytical technique
- Measures micronutrients in parts per million
- Ensures accurate detection of trace elements
Equipment Used
- Kjeldahl digestion unit
- Spectrophotometer
- Flame photometer
- Atomic absorption spectrophotometer
- Hot air oven
- Analytical balance
- Magnetic stirrer
- Titration assemblies
Quality Assurance
- Standard operating procedures followed
- Regular calibration of instruments
- Use of analytical grade chemicals
- Duplicate sample testing
- Cross verification of results
Benefits of Fertilizer and Vermicompost Testing
- Confirms nutrient content
- Ensures product quality
- Supports regulatory compliance
- Prevents adulteration
- Improves fertilizer efficiency
- Enhances farmer trust
- Optimizes crop nutrition planning
Report Format Provided
Each report includes
- Parameter wise results
- Nutrient percentage values
- Quality interpretation
- Compliance remarks
- Usage recommendations
Applications
- Fertilizer manufacturing quality control
- Vermicompost certification
- Government compliance
- Dealer verification
- Farmer advisory services
SLN Group fertilizer and vermicompost analysis services provide scientifically accurate evaluation of nutrient composition and product quality. By using validated laboratory methods and advanced instruments, the facility ensures reliable data that supports sustainable agriculture and informed fertilizer usage.