Table 1. Mean values (standard deviations) of soil pH, electric conductivity (EC), total dissolved solids (TDS), soluble Ca2+ and Mg2+, soil organic carbon (SOC) and inorganic carbon (SIC) in different soil layer, averaged over 31 sampling sites.
| Soil layer depths (cm) | pH | EC (mS cm−1) | TDS (mg kg−1) | Ca2+ content (mg kg−1) | Mg2+ content (mg kg−1) | SOC content (g kg−1) | SIC content (g kg−1) |
|---|---|---|---|---|---|---|---|
| 0–20 | 8.12 (0.22) b | 0.24 (0.11) d | 576 (267) d | 90 (35) a | 26 (10) a | 9.30 (2.37) a | 10.48 (2.58) b |
| 20–40 | 8.28 (0.22) a | 0.27 (0.15) cd | 647 (330) cd | 85 (36) a | 27 (17) a | 4.30 (1.16) b | 11.72 (3.01) ab |
| 40–60 | 8.24 (0.22) ab | 0.33 (0.17) bc | 813 (429) bc | 85 (29) a | 28 (14) a | 3.45 (0.90) b | 11.64 (3.20) ab |
| 60–80 | 8.17 (0.16) b | 0.41 (0.19) ab | 992 (498) ab | 89 (35) a | 29 (16) a | 2.91 (0.91) bc | 12.60 (3.83) a |
| 80–100 | 8.15 (0.17) b | 0.44 (0.20) a | 1078 (508) a | 91 (40) a | 31 (18) a | 2.36 (0.83) c | 12.72 (3.88) a |
Mean values followed by the same letter are not significantly different at P < 0.05 (LSD test).