optimization • APSIMWheatPhenology

library(APSIMWheatPhenology)

This page is to show how to optimize parameters related with wheat phenology (i.e. verns_sens, photop_sens and tt_floral_initiation).

In the first step, the observations are organized in a table with all required information.

obs <- read.csv(file = textConnection(
"Experiment,Cultivar,MetFile,Sowing,FloweringDAS
Exp1,Clt1,Met1,2010-05-20,70
Exp1,Clt2,Met1,2010-05-20,73
Exp1,Clt3,Met1,2010-05-20,80
Exp2,Clt1,Met2,2011-05-20,82
Exp2,Clt2,Met2,2011-05-20,85
Exp2,Clt3,Met2,2011-05-20,90
Exp3,Clt1,Met3,2012-05-20,82
Exp3,Clt2,Met3,2012-05-20,85
Exp3,Clt3,Met3,2012-05-20,90
"
))
knitr::kable(obs)

Experiment	Cultivar	MetFile	Sowing	FloweringDAS
Exp1	Clt1	Met1	2010-05-20	70
Exp1	Clt2	Met1	2010-05-20	73
Exp1	Clt3	Met1	2010-05-20	80
Exp2	Clt1	Met2	2011-05-20	82
Exp2	Clt2	Met2	2011-05-20	85
Exp2	Clt3	Met2	2011-05-20	90
Exp3	Clt1	Met3	2012-05-20	82
Exp3	Clt2	Met3	2012-05-20	85
Exp3	Clt3	Met3	2012-05-20	90

vern_sens <- seq(0, 3, 0.1)
photop_sens <- seq(0, 3, 0.1)
tt_floral_initiation <- seq(300, 1300, 10)