taiwan_model.RdQuantifies the chill accumulation by means of converting temperatures to chill-units.
taiwan_model(x, total = TRUE)
| 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 function returns values the chill-units for each temperature of vector (Total = FALSE), or returns the chill-units accumulation (Total = TRUE).
The model is based on chill-units, where 1 chill-unit is when the tree is exposure below 7.2°C. When the temperature is between 15.1°C and 26.6°C, there isn't accumulation of chill-unit. The chill-units accumulation is negative when occurs temperature above 26.7°C, and the chill-unit is -1 when occurs temperature above 27.8°C.
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.
#> [1] -11.5taiwan_model(x, FALSE)#> [1] 0.0 -1.0 0.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 -0.5 0.0 0.0 #> [16] 0.5 -1.0 0.0 0.0 -1.0 -1.0 -1.0 0.0 0.0 0.0 0.5 0.0 0.0 -1.0 1.0 #> [31] 0.0 0.0 0.0 -1.0 0.0 0.0 0.0 0.5 0.0 -1.0 0.0 0.5 0.0 0.5 -1.0 #> [46] 0.0 0.0 0.0 -1.0 0.5 1.0 0.0 -0.5 -0.5 -0.5 0.0 0.0 1.0 0.0 0.0 #> [61] 0.0 0.5 0.0 0.0 0.0 0.0 -1.0 1.0 0.0 0.0 0.0 -1.0 0.5 1.0 0.0 #> [76] 0.0 0.0 1.0 0.5 0.0 0.5 0.5 -1.0 0.5 -1.0 -1.0 0.0 0.0 0.0 0.0 #> [91] 0.5 0.0 0.5 0.0 0.5 0.0 0.5 0.5 -0.5 -1.0 0.0 0.5 0.0 0.0 0.5 #> [106] 0.5 0.0 0.0 0.0 0.0 0.5 0.0 -1.0 0.0 0.5 0.0 0.0 0.5 0.0 0.0 #> [121] 0.0 0.0 0.5 0.5 0.0 0.0 -1.0 0.0 0.0 0.0 0.0 -1.0 0.0 0.0 0.0 #> [136] 0.0 0.0 0.0 -1.0 0.0 0.0 0.5 0.5 -1.0 0.5 -0.5 -1.0 0.0 0.0 0.0 #> [151] 0.5 0.0 0.0 0.0 0.0 0.0 1.0 0.0 0.0 0.5 0.0 -1.0 0.0 0.5 0.0 #> [166] 0.5 0.0 0.0 -1.0 0.0 1.0 -0.5 0.0 0.0 0.0 0.0 -1.0 0.0 0.5 0.5 #> [181] 0.0 0.0 -1.0 0.0 0.0 0.5 -1.0 0.0 0.0 0.0 0.5 0.0 0.0 0.5 0.0 #> [196] 0.0 -1.0 1.0 -0.5 -1.0 -1.0 1.0 0.5 0.5 0.5 0.0 0.0 0.0 0.0 0.0 #> [211] 0.5 0.0 0.5 0.5 0.5 0.0 -1.0 -1.0 0.0 0.0 0.5 0.5 0.0 0.5 1.0 #> [226] 0.0 0.0 0.5 0.0 -1.0 -1.0 -1.0 0.5 -0.5 -0.5 0.0 0.0 0.5 0.5 -1.0 #> [241] -1.0 -1.0 0.5 0.5 0.0 0.5 0.5 0.0 0.0 -1.0 0.0 0.5 0.0 0.0 0.0 #> [256] -1.0 0.0 0.0 0.0 0.0 0.0 0.0 0.5 0.5 0.0 0.5 -1.0 0.0 0.5 0.0 #> [271] 0.5 0.5 -1.0 0.5 0.0 -1.0 0.0 0.5 -1.0 -0.5 0.0 0.0 -0.5 0.0 0.0 #> [286] 0.0 0.0 0.0 0.0 0.5 0.0 -1.0 0.5 0.0 0.0 0.0 0.5 0.0 0.0 -0.5 #> [301] 0.0 0.0 -1.0 -1.0 0.0 0.0 0.0 0.0 0.0 0.0 1.0 0.0 0.0 0.5 0.5 #> [316] 0.5 0.0 0.0 -1.0 0.5 0.5 0.0 -0.5 0.0 0.5 0.0 0.0 0.0 0.0 0.5 #> [331] -1.0 -0.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 -1.0 0.0 0.0 0.5 -1.0 0.0 #> [346] 0.0 -0.5 0.0 0.0 0.0 0.5 -0.5 -1.0 0.5 -1.0 0.0 0.0 0.0 0.0 0.0 #> [361] 0.0 0.0 -1.0 0.0 0.0 0.0 1.0 0.5 0.0 0.5 0.0 0.0 -1.0 0.0 0.0 #> [376] -1.0 -1.0 -1.0 0.0 0.0 0.0 0.5 0.0 0.0 0.0 -1.0 0.0 -0.5 -0.5 0.5 #> [391] 0.5 0.5 0.0 0.5 0.0 0.5 0.5 0.5 0.0 0.5 0.0 -1.0 -0.5 -1.0 -1.0 #> [406] -1.0 0.0 0.0 0.0 -0.5 0.5 0.0 0.5 -0.5 1.0 0.0 0.5 0.5 0.5 0.0 #> [421] 0.5 0.0 0.0 0.0 -1.0 -1.0 0.0 -1.0 0.5 0.5 0.0 0.0 -0.5 0.0 -0.5 #> [436] -1.0 0.5 0.0 0.0 0.0 0.0 -1.0 0.5 -0.5 1.0 1.0 0.0 0.0 0.5 0.5 #> [451] 0.0 0.0 0.0 -1.0 0.5 0.0 0.0 0.5 0.0 -0.5 0.0 0.0 0.0 0.5 0.5 #> [466] 1.0 0.0 -1.0 0.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.5 0.0 #> [481] -0.5 0.5 0.0 0.0 0.0 0.0 0.0 -0.5 0.0 0.0 0.5 0.0 0.5 0.0 0.0 #> [496] 0.0 0.0 0.0 0.0 0.5