Dose-response profile of degradation of agrochemical using lepidium
Estimation of the degradation profile of an agrochemical based on soil samples at depth 0-10cm from a calibration experiment.
data(lepidium)
A data frame with 42 observations on the following 2 variables.
conca numeric vector of concentrations (g/ha)
weighta numeric vector of plant weight (g) after 3 weeks' growth
It is an experiment with seven concentrations and six replicates per concentration. Lepidium is rather robust as it only responds to high concentrations.
Racine-Poon, A. (1988) A Bayesian Approach to Nonlinear Calibration Problems, J. Am. Statist. Ass., 83, 650–656.
lepidium.m1 <- drm(weight~conc, data=lepidium, fct = LL.4()) modelFit(lepidium.m1) plot(lepidium.m1, type = "all", log = "")
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