Table 4 Estimates of the thermal time parameters for shoot emergence
Parameter | Estimate ± S.E. for English acorns | Estimate ± S.E. for Italian acorns |
|---|---|---|
Base temperature (°C) | 4.9 ± 0.3 | 1.9 ± 0.5 |
Thermal time for 50 % shoot emergence' (θ 50) (degree-weeks). | 75.0 ± 3.6 | 102.2 ± 5.5 |
SD | 19.72 ± 1.63 | 22.39 ± 2.01 |
β 1 | −6.900 ± 0.527 | −8.278 ± 0.632 |
β 2 | 0.09198 ± 0.00762 | 0.081 ± 0.00725 |