ChillModels (version 1.0.2)

taiwan_model: Taiwan model

Description

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

Usage

taiwan_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 below 7.2<U+00B0>C. When the temperature is between 15.1<U+00B0>C and 26.6<U+00B0>C, there isn't accumulation of chill-unit. The chill-units accumulation is negative when occurs temperature above 26.7<U+00B0>C, and the chill-unit is -1 when occurs temperature above 27.8<U+00B0>C.

References

LU, M. T. et al. 2012. A model for estimating chilling requirement of very low-chill peaches in Taiwan. Acta Horticulturae, n. 962, p. 245.

Examples

# NOT RUN {
x <- rnorm(500, 20, 7)
taiwan_model(x)
taiwan_model(x, FALSE)

# }