Table 1 Effect of agricultural management practices on soil C stock at various soil depths. The database of the meta-analyses can be found as Supplementary Tables S1–S4 online
Soil depth (cm) | Relative change in C stock (kg C ha−1 year−1) | |
|---|---|---|
Mean | 95% CI | |
Conservation tillage | ||
0–10 | 139 | 101 to 184 |
10–20 | 24 | −27 to 75 |
20–30 | 21 | 5 to 35 |
30–40 | 36 | 0 to 80 |
Residue retention | ||
0–10 | 62 | 31 to 91 |
10–20 | 30 | −5 to 71 |
20–30 | 2 | −9 to 11 |
30–40 | NA | NA |
Use of pasture | ||
0–10 | 140 | 69 to 250 |
10–20 | −18 | −153 to 128 |
20–30 | 14 | −60 to 65 |
30–40 | NA | NA |
Fertiliser N application | ||
0–10 | 47 | 28 to 66 |
10–20 | 11 | 1 to 20 |
20–30 | 2 | −8 to 11 |
30–40 | NA | NA |
