Variables:
A data frame with 34 observations on the following 3 variables.
-
start
-
a numeric vector of left endpoints of the monitoring intervals
-
end
-
a numeric vector of right endpoints of the monitoring intervals
-
count
-
a numeric vector of the number of seeds germinated in the interval between start and end
-
time
-
a numeric vector of the non-zero left endpoints of the monitoring intervals (often used for recording in practice)
Details
The germination tests of chickweed seeds from chlorsulfuron resistant and sensitive biotypes in central Zealand were done in petri dishes (diameter: 9.0cm) in a dark growth cabinet at a temperature of 5 degrees Celsius. The seeds were incubated for 24 hours in a 0.3% solution of potassium nitrate in order to imbibe seeds prior to the test. A total of 200 seeds were placed on filter plate. After initialization of the tests, the number of germinated seeds was recorded and removed at 34 consecutive inspection times. Definition of a germinated seed was the breakthrough of the seed testa by the radicle.
Chickweed is known to have dormant seeds and therefore we would not expect 100% germination. It means that the upper limit of the proportion germinated has to be incorporated as a parameter into a model, which adequately reflects the experimental design as well as any expectations about the resulting outcome.
