Table 4. Selected characteristics of the 0–15 cm mineral soil.
| Site | Bulk density (g/cm3) | Soil organic C pool (Mg/ha) | Soil total N pool (kg/ha) | Soil total P pool (kg/ha) | Soil total N:P ratio | Soil extractable N pool (kg/ha) | Soil extractable P pool (kg/ha) | Soil extractable N:P ratio |
| PF | 1.35(0.02) | 17(2) | 1148(150) | 213(13) | 5.4(0.6) | 36(3) | 22(3) | 1.8(0.3) |
| PBM1 | 0.92(0.03) | 35(1) | 1759(77) | 200(11) | 8.8(0.3) | 81(5) | 17(2) | 4.8(0.6) |
| PBM2 | 1.02(0.07) | 31(5) | 1774(271) | 243(29) | 7.2(0.3) | 96(6) | 17(3) | 6.1(1.2) |
| PBM3 | 0.98(0.04) | 33(2) | 2023(115) | 185(12) | 11.0(0.7) | 91(8) | 19(1) | 4.9(0.2) |
| REB1 | 1.09(0.04) | 28(2) | 2156(201) | 394(36) | 5.5(0.2) | 117(10) | 65(6) | 1.8(0.1) |
| REB2 | 0.89(0.04) | 43(4) | 2789(266) | 330(15) | 8.4(0.7) | 113(14) | 39(4) | 3.0(0.5) |
| MEB | 0.84(0.04) | 40(4) | 2682(268) | 321(19) | 8.4(0.7) | 128(13) | 33(3) | 3.9(0.4) |
| MTEB | 0.88(0.03) | 44(3) | 2533(178) | 280(16) | 9.0(0.4) | 123(11) | 25(4) | 5.1(0.8) |
All data are means (±1 SE), n = 4. The corresponding full names of eight study sites are listed in Table S1.