ChillModels (version 1.0.2)

lowchill_model: Low Chill

Description

Quantifies the chill accumulation by means of converting temperatures to chill-units.

Usage

lowchill_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).

Value

The function returns values the chill-units for each temperature of vector (Total = FALSE), or returns the chill-units accumulation (Total = TRUE).

Details

The model is based on chill-units, where 1 chill-unit is when the tree is exposure between 1.8<U+00B0>C and 8<U+00B0>C. When the temperature is above 19.5<U+00B0>C, the chill-unit is -1. The chill-units accumulation is 0 when occurs temperature below -1<U+00B0>C and between 14<U+00B0>C and 17<U+00B0>C.

References

GILREATH, Phyllis R. & BUCHANAN, D. W. (1981). Rest Prediction Model for Low-chilling 'Sungold' Nectarine. J. Amer. Soc. Hort. Sci.

Examples

# NOT RUN {
x <- rnorm(500, 12, 5)
lowchill_model(x)
lowchill_model(x, FALSE)

# }