Table 3. Best estimates of the slopes (m) and y-intercepts (c), and associated uncertainties ( and ), for the significant linear regressions (assuming a common uncertainty in all y measurements).
The number of data points in each regression is indicated in column n, and the relative error for predicted leaf water potential based on uncertainties in m and c is shown in column /Y.
Crop | Date | Irrigation† | n | m (δm) | c (δc) | δY/Y |
---|---|---|---|---|---|---|
Wheat | Apr. 12 | F | 8 | −31.56 (3.63) | 19.88 (2.52) | 2.52 |
Corn | Jun. 7 | D | 9 | 29.55 (3.90) | −21.71 (2.68) | 4.53 |
Jun. 7 | F | 9 | 28.85 (10.37) | −22.15 (7.54) | 12.82 | |
Jun. 11 | D | 9 | 23.18 (7.18) | −16.40 (4.55) | 5.19 | |
Cotton | Aug. 9 | D | 9 | 5.51 (1.56) | −5.63 (0.75) | 0.50 |
Aug. 9 | F | 9 | 5.05 (1.49) | −5.71 (0.85) | 0.60 | |
Aug. 9 | D/F | 18 | 4.07 (0.93) | −5.04 (0.49) | 0.34 |
Note:
“D” and “F” represent “deficit” and “full” irrigation.