| Soil properties | Methods | |
| Soil physical properties | EC (dS∙m−1) | Saturated paste extract [39] |
| Soil texture [(%) silt, (%) clay, (%) sand] | Four reading methods for soil textures [40] | |
| Soil chemical properties | pH | Saturated paste extract [41] |
| Organic carbon (%) | Wet oxidation [40] | |
| CCE (%) | Titration [42] | |
| Total N (%) | Kjeldahl [43] | |
| Available P (mg∙kg−1) | Olsen [44] | |
| Available K (mg∙kg−1) | Atomic absorption spectroscopy [41] | |
| Fe (mg∙kg−1), Zn (mg∙kg−1), Cu (mg∙kg−1), and Mn (mg∙kg−1) | 0.005 M extraction using diethylenetriamine and triethanolamine (DTPA-TEA extractant) [45] | |