barley {drcSeedGerm}

A series of germination assays with barley

Description

The germination of barley was assayed at 9 temperature levels, on three replicated Petri dishes at each temperature and 50 seeds per Petri dish. Inspections were made in several times after the beginning of the assay.

Usage

data("barley")

Format

A data frame with 810 observations on the following 7 variables.

Dish

a numeric vector with the coding for Petri dishes

Temp

a numeric vector with the temperature level

timeBef

a numeric vector, with the start time for each inspection interval

timeAf

a numeric vector, with the end time for each inspection interval

nSeeds

a numeric vector, with the number of germinated seeds at each inspection interval

nCum

a numeric vector, with the cumulative number of germinated seeds at each assessment time

propCum

a numeric vector, the cumulative proportion of germinated seeds at each assessment time

Details

The variable 'timeAf' contains the value 'Inf' (Infinity), that corresponds to the seeds which did not germinate during the assay, for which we the germination time might be comprised from the last assessment time to infinity.

Author(s)

Andrea Onofri

Source

no reference yet

References

Onofri, A., Benincasa, P., Mesgaran, M.B., Ritz, C., 2018. Hydrothermal-time-to-event models for seed germination. European Journal of Agronomy 101, 129–139.

Examples

data(barley)