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Table 5.
Changes in the stocks of soil organic carbon during 1992–2015 in crop rotation with and without lucerne on Typical chernozem of the Balti Steppe, t C/ha (mean of three replicates)
| Soil layers, cm | Crop rotation with lucerne | Crop rotation without lucerne | ||||||
|---|---|---|---|---|---|---|---|---|
| 1992 | 2015 | ± | % | 1992 | 2015 | ± | % | |
| 0-20 | 71.0 | 59.0 | -12.0 | 17.3 | 66.7 | 52.6 | -14.1 | -21.1 |
| 20-40 | 69.6 | 63.9 | -6.0 | 8.6 | 62.9 | 56.4 | -6.5 | -10.3 |
| 40-60 | 56.2 | 61.6 | +5.4 | 9.6 | 51.5 | 52.5 | +1.0 | +1.9 |
| 60-80 | 37.2 | 52.9 | +15.7 | 42.2 | 31.1 | 38.1 | +7.0 | +22.5 |
| 80-100 | 37.0 | 43.1 | +6.1 | 16.5 | 19.3 | 27.7 | +8.4 | +43.5 |
| 0-100 | +9.2 | -4.2 | ||||||
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