terbuthylazin

R Documentation

The effect of terbuthylazin on growth rate

Description

Test on the effect of terbuthylazin on Lemna minor, performed on an aseptic culture according to the OECD-guidelines.

Usage

data(terbuthylazin)

Format

A data frame with 30 observations on the following 2 variables.

dose

a numeric vector of dose values.

rgr

a numeric vector of relative growth rates.

Details

Dose is

\mu l^{-1}

and rgr is the relative growth rate of Lemna.

Source

Cedergreen N. (2004). Unpublished bioassay data.

Examples

## displaying first 6 rows of the data set
head(terbuthylazin)

## Fitting log-logistic model
terbuthylazin.m1 <- drm(rgr~dose, data = terbuthylazin, fct = LL.4())
summary(terbuthylazin.m1)

## Fitting log-logistic model
##  with Box-Cox transformation
terbuthylazin.m2 <- boxcox(terbuthylazin.m1, method = "anova")
summary(terbuthylazin.m2)