Table 1 One-tailed Welch Two Sample t-test for difference of log(SOC stocks (0-100 cm) (Mg/ha C)), by number of years corn planted in corn-soybean systems (95%)
From: Crop rotation and the impact on soil carbon in the U.S. Corn Belt
Null Hypothesis (H0) | Estimate | Statistic | P.value | Conf.low | Conf.high |
|---|---|---|---|---|---|
log(SOC(1c))-log(SOC(0c)) < 0 | 0.239 | 1.41 | 0.0845 | − 0.0487 | Inf |
log(SOC(2c))-log(SOC(0c)) < 0 | 0.386 | 2.27 | 0.0149 | 0.0983 | Inf |
log(SOC(3c))-log(SOC(0c)) < 0 | 0.671 | 3.17 | 0.00121 | 0.317 | Inf |
log(SOC(2c))-log(SOC(1c)) < 0 | 0.147 | 1.52 | 0.0646 | − 0.0125 | Inf |
log(SOC(3c))-log(SOC(1c)) < 0 | 0.432 | 2.71 | 0.00408 | 0.167 | Inf |
log(SOC(3c))-log(SOC(2c)) < 0 | 0.285 | 1.79 | 0.0386 | 0.02 | Inf |