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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