Table 1 Parameters for the van Genuchten model (Eq. 2) optimized for the retention curve data of 9 soil samples from a vineyard in southeastern Washington and the r2 of the optimized model to the data, estimated by means of the RETC code [21]. The average was determined by fitting the retention curve to the pooled data of all samples
From: Predawn leaf water potential of grapevines is not necessarily a good proxy for soil moisture
Location | Depth (cm) | θr (m3 m−3) | θs (m3 m−3) | α (cm−1) | n | r2 |
|---|---|---|---|---|---|---|
1 | 15–22 | 0.063 | 0.49 | 0.013 | 1.591 | 0.980 |
1 | 30–37 | 0.07 | 0.51 | 0.017 | 1.571 | 0.976 |
1 | 45–52 | 0.02 | 0.46 | 0.025 | 1.344 | 0.989 |
2 | 15–22 | 0.06 | 0.42 | 0.003 | 2.047 | 0.964 |
2 | 30–37 | 0.00 | 0.46 | 0.011 | 1.370 | 0.989 |
2 | 45–52 | 0.04 | 0.45 | 0.005 | 1.642 | 0.971 |
3 | 15–22 | 0.09 | 0.49 | 0.014 | 1.632 | 0.965 |
3 | 30–37 | 0.06 | 0.49 | 0.013 | 1.464 | 0.987 |
3 | 45–52 | 0.04 | 0.48 | 0.005 | 1.604 | 0.979 |
Average | 0.05 | 0.47 | 0.008 | 1.601 | 0.938 |