Soil quality indicator | Method |
Soil organic matter (SOM) | Walkley-Black method |
Total nitrogen (TN) | Kjeldahl digestion method |
Available phosphorus (AP) | Extracting-spectrophotometer detection |
Available phosphorus (AK) | Extracting-flame photometry detection |
pH | Electrometric method |
Dry bulk density (BD) | Core method |
Clay % | Pipette method |
Electrical conductivity (EC) | Conductivity meter |