From: Organic phosphorus leaching risk from agricultural soils across China
Soils | pH | CEC (cmol g−1) | WSS (mS cm−1) | CaCO3 (mg kg−1) | SOM (%) | DOC (mg kg−1) |
---|---|---|---|---|---|---|
Total soils (n = 63) | ||||||
 Min | 4.47 | 6.23 | 0.01 | 0.81 | 0.35 | 0.04 |
 Max | 9.18 | 49.6 | 0.95 | 73.7 | 14.8 | 0.36 |
 Mean | 7.23 | 26.6 | 0.11 | 14.1 | 4.48 | 0.14 |
 SD | 1.29 | 9.37 | 0.13 | 14.9 | 2.68 | 0.07 |
Paddy soils (n = 21) | ||||||
 Min | 4.99 | 14.9 | 0.02 | 1.21 | 0.35 | 0.04 |
 Max | 8.47 | 41.7 | 0.30 | 41.7 | 5.80 | 0.34 |
 Mean | 6.83b | 25.6b | 0.09b | 11.6ab | 3.91b | 0.12b |
 SD | 1.25 | 6.27 | 0.08 | 12.38 | 1.52 | 0.07 |
Red soils (n = 11) | ||||||
 Min | 4.47 | 13.1 | 0.01 | 1.21 | 0.84 | 0.06 |
 Max | 8.04 | 49.3 | 0.95 | 16.2 | 7.00 | 0.36 |
 Mean | 6.10b | 28.0ab | 0.21a | 6.30b | 4.14b | 0.16ab |
 SD | 1.41 | 9.48 | 0.27 | 5.85 | 1.78 | 0.09 |
Chernozem (n = 13) | ||||||
 Min | 6.67 | 15.9 | 0.04 | 0.81 | 3.54 | 0.09 |
 Max | 8.79 | 46.0 | 0.26 | 73.7 | 14.8 | 0.23 |
 Mean | 7.87a | 32.6a | 0.11ab | 20.6a | 7.34a | 0.18a |
 SD | 0.78 | 9.64 | 0.06 | 22.1 | 3.34 | 0.04 |
Other soils (n = 18) | ||||||
 Min | 6.20 | 6.23 | 0.01 | 1.62 | 0.87 | 0.06 |
 Max | 9.18 | 41.4 | 0.17 | 43.7 | 10.6 | 0.17 |
 Mean | 7.92a | 22.7b | 0.08b | 17.2ab | 3.27b | 0.11b |
 SD | 0.87 | 10.5 | 0.05 | 13.4 | 2.32 | 0.02 |