| Tests | Buishand’s test | Bayesian BEAST test | |||||
| Sites | Break date | Average before break date (t.C/ha) | Average after break date (t.C/ha) | Buishand’s statistics (U and P-value) | Break date | Probability | Slope |
| Syer | 2013 | 20.51 | 20.60 | U = 1.25 Pv = 2.2 × 10−16 | 2017 | 0.994 | 0.39 |
| 2008 | 0.012 | 0.04 | |||||
| Tessékéré | 2012 | 26.50 | 28.62 | U = 1.58 Pv = 2 × 10−16 | 2012 | 0.936 | 0.44 |
| 2016 | 0.162 | 0.28 | |||||
| 2007 | 0.004 | 3 × 10−04 | |||||
| Loughéré-thioly | 2006 | 18.02 | 18.23 | U = 1.28 Pv = 5 × 10−05 | 2006 | 0.502 | 0.03 |
| 2017 | 0.275 | 0.01 | |||||
| Ballou | 2009 | 11.19 | 11.18 | U = 1.68 Pv = 2.1 × 10−16 | 2004 | 0.513 | −2.1 × 10−04 |
| 2016 | 0.028 | −1.5 × 10−04 | |||||