| cherry_model {ChillModels} | R Documentation |
Sweet Cherry Model
Description
Quantifies the chill accumulation by means of converting temperatures to chill-units.
Usage
cherry_model(x, total = TRUE)
Arguments
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). |
Details
The model is based on chill-units, where 1 chill-unit is when the tree is exposure between -2.1°C and 7°C. When the temperature is above 18°C the chill-unit is -1. The chill-units accumulation is 0 when occurs temperature between 14°C and 16°C.
Value
The function returns values the chill-units for each temperature of vector (Total = FALSE), or returns the chill-units accumulation (Total = TRUE).
Note
This model was make for quantifying the chill accumulation rates to 'Sweetheart' Sweet Cherry. We aren't recommended the application for others species.
References
GUAK, Sunghee & NEILSEN, Denise. (2013). Chill Unit Models for Predicting Dormancy Completion of Floral Buds in Apple and Sweet Cherry.
Examples
x <- rnorm(500, 8, 7)
cherry_model(x)
cherry_model(x, FALSE)