Table 1.
Soil physical and chemical properties (0–0.2 and 0.2–0.4 m depth).
| Parameters | Environments and Depths (m) | |||||
|---|---|---|---|---|---|---|
| La Serena | Los Tilos | Chillán | ||||
| 0–0.2 | 0.2–0.4 | 0–0.2 | 0.2–0.4 | 0–0.2 | 0.2–0.4 | |
| Clay (%) | 20.2 | 20.3 | 21.5 | 27.3 | 20.7 | 15.9 |
| Silt (%) | 30.2 | 31.2 | 50.0 | 49.3 | 43.6 | 45.4 |
| Sand (%) | 49.6 | 48.5 | 28.5 | 23.4 | 35.7 | 38.7 |
| Bulk density (g·cm−3) | 1.76 | 1.80 | 1.20 | 1.24 | 1.00 | 1.05 |
| pH (soil:water 1:2.5) | 6.94 | 6.87 | 8.25 | 8.19 | 5.74 | 5.76 |
| Organic matter (g·kg−1) | 11.6 | 11.3 | 19.6 | 21.7 | 63.0 | 56.2 |
| EC * (dS·m−1) | 0.15 | 0.23 | 0.11 | 0.15 | 0.11 | 0.07 |
| Available N (mg·kg−1) | 18.0 | 20.0 | 11.0 | 14.0 | 40.0 | 38.0 |
| Olsen P (mg·kg−1) | 51.3 | 44.9 | 3.9 | 5.1 | 35.2 | 25.3 |
| Exchangeable K (cmoL·kg−1) | 0.85 | 0.67 | 0.35 | 0.41 | 0.65 | 0.39 |
| Exchangeable Ca (cmoL·kg−1) | 8.12 | 8.22 | 20.70 | 19.66 | 6.74 | 5.89 |
| Exchangeable Mg (cmoL·kg−1) | 2.41 | 2.61 | 0.92 | 0.86 | 0.95 | 0.72 |
| Exchangeable Na (cmoL·kg−1) | 0.59 | 0.69 | 0.49 | 0.40 | 0.16 | 0.19 |
| Exchangeable Al (cmoL kg−1) | 0.05 | 0.05 | 0.04 | 0.04 | 0.21 | 0.10 |
| Available Fe (mg·kg−1) | 21.5 | 20.8 | 16.7 | 17.0 | 59.8 | 46.5 |
| Available Mn (mg·kg−1) | 36.3 | 34.3 | 11.8 | 11.5 | 9.8 | 5.4 |
| Available Zn (mg·kg−1) | 4.5 | 4.4 | 1.1 | 1.2 | 0.7 | 0.6 |
| Available Cu (mg·kg−1) | 9.2 | 9.3 | 8.9 | 8.8 | 1.4 | 1.2 |
| Available B (mg·kg−1) | 2.3 | 2.4 | 0.8 | 0.8 | 0.5 | 0.4 |
| Available S (mg·kg−1) | 40.8 | 64.9 | 11.9 | 13.5 | 14.2 | 15.4 |
| Total Cd (mg·kg−1) | 1.33 | 1.49 | 0.52 | 0.51 | 0.21 | 0.18 |
* EC, electrical conductivity.