seedweight.model {ZeBook} | R Documentation |
The SeedWeight model
Description
The SeedWeight model is a logistic model of grain weight over time in wheat. The model was proposed by Darroch & Baker (1990) in a study of grain filling in three spring wheat genotypes. This model has a single input variable, degree days after anthesis noted DD, and three parameters, noted W, B and C. Parameters are estimated from observations.
Usage
seedweight.model(DD, W, B, C)
Arguments
DD |
: degree days after anthesis |
W |
: parameter of the model |
B |
: parameter of the model |
C |
: parameter of the model |
Value
Seed Weight for each TT
Examples
plot(1:500,seedweight.model(1:500, W=30,B=4,C=0.020),type="l",
xlab="degree days after anthesis", ylab="grain weight")
[Package ZeBook version 1.1 Index]