Table 2 Model equations for estimating seedling number (SN) of different leaf ages using coverage degree and angular points
From: A method to calculate the number of wheat seedlings in the 1st to the 3rd leaf growth stages
Varieties | La | Models | R2 | Adjusted-R2 | RMSE | Rep (%) |
|---|---|---|---|---|---|---|
YM23 | 1 | SN1 = 0.47 × Ha + 119.37 × Co + 5.65 | 0.9867 | 0.9864 | 10.31 | 7.72 |
2 | SN2 = 0.22 × Ha + 58.64 × Co + 18.43 | 0.9781 | 0.9775 | 12.16 | 8.79 | |
3 | SN3 = 0.15 × Ha + 37.65 × Co + 14.73 | 0.9706 | 0.9698 | 12.98 | 8.91 | |
HM7 | 1 | SN1 = 0.41 × Ha + 97.13 × Co + 11.37 | 0.9765 | 0.9759 | 11.86 | 9.22 |
2 | SN2 = 0.19 × Ha + 43.93 × Co + 6.94 | 0.9611 | 0.9601 | 13.13 | 10.63 | |
3 | SN3 = 0.13 × Ha + 31.05 × Co + 17.72 | 0.9508 | 0.9495 | 17.32 | 12.49 | |
YF4 | 1 | SN1 = 0.52 × Ha + 125.21 × Co + 2.71 | 0.9806 | 0.9801 | 9.67 | 8.12 |
2 | SN2 = 0.25 × Ha + 59.35 × Co + 6.21 | 0.9713 | 0.9705 | 12.59 | 9.19 | |
3 | SN3 = 0.16 × Ha + 39.11 × Co + 11.51 | 0.9549 | 0.9537 | 16.39 | 11.31 |