MeanGermTime
computes the mean germination time according to the
following formula
edmond_effects_1958,czabator_germination_1962,ellis_improved_1980,labouriau_germinacao_1983,ranal_how_2006germinationmetrics.
Where, is the time
from the start of the experiment to the
th observation,
is the number of seeds
germinated in the th time (not the
accumulated number, but the number correspondent to the
th observation) and
is the last time of germination.
It is the same as Sprouting Index described by
smith_germinating_1964;textualgerminationmetrics
() and Germination Resistance
() described by
gordon_observations_1969,gordon_germination_1971;textualgerminationmetrics.
It is the inverse of mean germination rate ().
It indicates the average length of time required for maximum germination of a
seed lot. Lower the , faster
the sample has germinated and reflects seed vigor.
VarGermTime
computes the variance of germination time according to the
following formula
labouriau_germinacao_1983,ranal_how_2006germinationmetrics.
Where, is the time
from the start of the experiment to the
th observation,
is the number of seeds
germinated in the th time (not the
accumulated number, but the number correspondent to the
th observation) and
is the last time of germination.
SEGermTime
computes the standard error of germination time
()
according to the following formula
labouriau_germinacao_1983,ranal_how_2006germinationmetrics.
Where, is the number
of seeds germinated in the th time (not
the accumulated number, but the number correspondent to the
th observation) and
is the last time of germination.
It signifies the accuracy of the calculation of the mean germination time.
CVGermTime
computes the coefficient of variation of germination time
() according to the
following formula ranal_how_2006germinationmetrics.
This indicates the uniformity of germination and permits comparisons
irrespective of the magnitude of mean germination time
().