This function calculates the mean germination time of germination according at the time lapse of the evaluations.

ger_MGT(evalName, data)

Arguments

evalName

Prefix of the names of the periods of evaluation.

data

The name of the data frame containing the data.

Value

It returns an vector with the values of Mean Germination Time.

Details

It was proposed by Haberlandt in 1875. It is calculated as the weighted average germination time. The number of germinated seeds at the intervals established for the collection of data is used as weight. It is expressed in terms of the same units of time used in the germination count (CZABATOR, 1962).

References

CZABATOR, F. J. Germination value: an index combining speed and completeness of pine seed germination. Forest Science, v. 8, n. 4, p. 386-396, 1962.

Examples

library(GerminaR) dfr <- prosopis mgt <- ger_MGT(evalName = "D", data = dfr) mgt
#> [1] 1.280000 1.220000 1.320000 1.140000 1.040000 1.060000 1.000000 1.020000 #> [9] 1.900000 1.700000 1.880000 1.840000 1.100000 1.160000 1.080000 1.060000 #> [17] 2.666667 2.708333 2.531915 2.897959 1.959184 1.940000 1.833333 1.860000 #> [25] 5.382979 5.458333 5.479167 5.448980 3.160000 2.960000 2.900000 2.957447 #> [33] 6.680851 6.063830 6.695652 6.653061 4.326087 4.333333 4.446809 4.446809 #> [41] 1.040000 1.000000 1.020000 1.000000 1.060000 1.040000 1.020000 1.020000 #> [49] 1.120000 1.062500 1.060000 1.062500 2.333333 2.346939 2.375000 2.255319 #> [57] 1.653061 1.729167 2.173913 1.714286 2.940000 2.520833 2.714286 2.740000 #> [65] 3.380000 3.354167 3.360000 3.387755 3.333333 3.166667 3.250000 3.400000 #> [73] 6.800000 7.400000 6.555556 7.181818 NaN NaN NaN NaN