Table 7. Correlation between the stability parameters of aggregates, aggregate-associated C and total SOC in 0–60 cm depth soils.
SOC | > 0.25 mm water-stable aggregates | MWD | GMD | ELT | D | > 2 mm aggregate-associated C | 1–2 mm aggregate-associated C | 0.25–1.00 mm aggregate-associated C | 0.053–0.250 mm aggregate-associated C | 0.02–0.053 mm aggregate-associated C | |
> 0.25 mm water-stable aggregates | 0.35 | ||||||||||
MWD | 0.57 | 0.71 | |||||||||
GMD | 0.36 | 0.73 | 0.64 | ||||||||
ELT | -0.34 | -1.00** | -0.72 | -0.74 | |||||||
D | -0.21 | -0.75 | -0.79* | -0.91** | 0.76* | ||||||
> 2 mm aggregate-associated C | 0.96** | 0.57 | 0.71 | 0.47 | -0.56 | -0.37 | |||||
1–2 mm aggregate-associated C | 0.93** | 0.51 | 0.79* | 0.39 | -0.50 | -0.36 | 0.96** | ||||
0.25–1.00 mm aggregate-associated C | 0.95** | 0.49 | 0.78* | 0.41 | -0.48 | -0.37 | 0.97** | 1.00** | |||
0.053–0.25 mm aggregate-associated C | 0.96** | 0.44 | 0.74 | 0.34 | -0.43 | -0.30 | 0.97** | 0.99** | 1.00** | ||
0.02–0.053 mm aggregate-associated C | 0.94** | 0.46 | 0.76* | 0.32 | -0.45 | -0.30 | 0.96** | 1.00** | 0.99** | 1.00** | |
< 0.02 mm aggregate-associated C | 0.91** | 0.49 | 0.75 | 0.28 | -0.48 | -0.27 | 0.95** | 0.99** | 0.98** | 0.98** | 0.99** |
* and ** in the table express a significant level at P<0.05 and P<0.01, respectively.