Table 4.
Carbon stock differences between SOC/clay thresholds for Woburn and Highfield soils. Carbon stock calculated to 25 cm depth.
| Site | SOC/clay | Carbon stock at SOC/clay (t C ha−1) | Difference in carbon stocks between SOC/clay ratios (Mg C ha−1) | ||
|---|---|---|---|---|---|
| SOC/claya | |||||
| 1/8 | 1/10 | 1/13 | |||
| Woburn | 1/8 | 65.0 | – | – | – |
| 1/10 | 52.0 | 13.0 | – | – | |
| 1/13 | 40.0 | 25.0 | 12.0 | – | |
| 1/16b | 32.5 | 32.5 | 19.5 | 7.5 | |
| Highfield | 1/8 | 92.0 | – | – | – |
| 1/10 | 73.6 | 18.4 | – | – | |
| 1/13 | 56.6 | 35.4 | 17.0 | – | |
| 1/16b | 46.0 | 46.0 | 27.6 | 10.6 | |
aDashes indicate not applicable.
bTypical of arable management in the two experiments.