TABLE 2.
Soil organic C stock (Mg ha−1) in equivalent soil volume and mass basis under different levels of conservation agriculture in various soil layers after 10 years of adoption
| Treatment | Equivalent soil volume basis | |||||
|---|---|---|---|---|---|---|
| Soil layer (cm) | ||||||
| 0–7.5 | 7.5–15 | 15–30 | 30–45 | 45–60 | 0–60 | |
| TA | 7.12 b | 5.06 b | 8.08 a | 7.86 a | 8.58 a | 36.70 b |
| pCA1 | 8.93 ab | 5.60 b | 8.66 a | 8.97 a | 7.49 a | 39.66 ab |
| fCA | 9.99 a | 6.86 a | 10.32 a | 7.76 a | 8.74 a | 43.67 a |
| pCA2 | 9.36 ab | 5.77 b | 8.78 a | 8.11 a | 9.32 a | 41.34 ab |
| Equivalent soil mass basis | ||||||
|---|---|---|---|---|---|---|
| Soil mass (Mg ha−1) | ||||||
| ~1,143 | ~1,136 | ~2,228 | ~2,282 | ~2,346 | ~9,194 | |
| TA | 7.02 b | 5.14 b | 7.83 a | 7.75 a | 8.50 a | 36.25 b |
| pCA1 | 8.99 a | 5.72 ab | 8.62 a | 8.93 a | 7.53 a | 39.79 ab |
| fCA | 10.22 a | 6.82 a | 10.56 a | 7.82 a | 8.79 a | 44.22 a |
| pCA2 | 9.19 a | 5.62 b | 8.90 a | 8.17 a | 9.30 a | 41.18 ab |
Note: Means with at least one common small letter are not statistically significant using Tukey's honest significant difference (HSD) at p < 0.05.
Abbreviations: fCA, full conservation agriculture; pCA1, partial conservation agriculture 1; pCA2, partial conservation agriculture 2; TA, traditional agriculture.