Description Usage Arguments Details Value References Examples
Quantifies the chill accumulation by means of converting temperatures to positive chill-units - Modified Utah Model.
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x |
Vector containing temperature values (Celsius-degree). |
total |
TRUE Shows the total value of accumulation, FALSE shows the value of chill-unit for each temperature (TRUE is default). |
The PCU Model is the modified Utah Model. When the temperature is above 15.9°C, the chill-unit is 0. This modification was made because when the Utah model is applied in warm conditions, accumulation becomes negative.
The function returns values the chill-units for each temperature of vector.
Richardson, E. A. et al. 1974. "A Model for Estimating the Completation of Rest for 'Redhaven' and 'Elberta' Peach Trees". Research Reports & Notes.
Linsley-Noakes, G. C. et al. 1995. "Estimating daily positive Utah Chill units using daily minimum and maximum temperatures".
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