Table 1.
Summary of laboratory method and procedures used to determine soil physicochemical.
| S/N | Parameters | Method or procedures |
|---|---|---|
| 1. | Soil bulk density | Core method [34] |
| 2. | Soil moisture content | Gravimetric method [34] |
| 3. | Soil particle size distribution | Hydrometer |
| 4. | soil textural class | United States Department of Agriculture (USDA) textural triangle [35] |
| 5. | Soil pH | Potentiometrically using a standard pH meter (1:2.5 soil-to-water ratio) [36] |
| 6. | Soil organic carbon (SOC %) | Walkley and Black wet digestion [37] |
| 7. | Soil organic matter | Multiply SOC by 1.724 [37] |
| 8. | Total nitrogen | Kjeldahl digestion and titration procedure |
| 9. | Available phosphorus | spectrophotometer at a wavelength of 882 nm [38] |
| 10. | Cation exchange capacity (CEC) | Ammonium acetate method |
| 11. | Exchangeable acidity | Saturating the soil samples with potassium chloride solution and titrated with sodium hydroxide [39] |
| 12. | Exchangeable aluminum | Atomic absorption a spectrophotometer (AAS) at 309.3 nm using acetylene flame [40] |
| 13. | Exchangeable hydrogen | Difference between exchangeable acidity and exchangeable aluminum [41,42] |