Table 1. Selected soil characteristics.
| Soil characteristics | Soil type | |
|---|---|---|
| Sandy loam | Clay | |
| O.M. (%) | 2.2 | 3.7 |
| pH in CaCl2 | 4.0 | 4.7 |
| Base saturation (%) | 23 | 58 |
| CEC (mMc dm-3) | 68 | 125 |
| P-resin (mg dm-3) | 171 | 167 |
| Exchangeable-K (mMc dm-3) | 4 | 6 |
| Ca (mMc dm-3) | 21 | 32 |
| Mg (mMc dm-3) | 26 | 22 |
| B (mg dm-3) | 0.8 | 3.0 |
| Cu a (mg dm-3) | 0.9 | 2.8 |
| Fe (mg dm-3) | 113 | 24 |
| Mn (mg dm-3) | 3.8 | 9.0 |
| Zn (mg dm-3) | 0.4 | 1.9 |
| Bulk density (g cm-3) | 1.19 | 1.43 |
| Total porosity (%) | 50 | 35 |
| Clay (%) | 18.1 | 64.4 |
| Silt (%) | 5.1 | 16.6 |
| Sand (%) | 76.8 | 19.0 |
| PMCF b | kaolinite | gibbsite and hematite |
aCu, Fe, Mn and Zn by DTPA-TEA extractor.
bPredominant mineral clay fraction by x-ray diffraction analysis.
Abbreviations: O.M. = organic matter; CEC = cation exchange capacity.