MeanGermPercent: Mean germination percentage and number of seeds per time...

In germinationmetrics: Seed Germination Indices and Curve Fitting

Mean germination percentage and number of seeds per time interval

Description

Compute the following metrics:

MeanGermPercent

Mean/average germination percentage per unit time (\mjseqn\overlineGP) \insertCiteczabator_germination_1962germinationmetrics.

MeanGermNumber

Number of seeds germinated per unit time (\mjseqn\overlineN) \insertCitekhamassi_optimal_2013germinationmetrics.

\loadmathjax

Usage

MeanGermPercent(
  germinated.seeds,
  germ.counts,
  total.seeds,
  intervals,
  partial = TRUE
)

MeanGermNumber(germ.counts, intervals, partial = TRUE)

Arguments

germinated.seeds	Number of germinated seeds
germ.counts	Germination counts at each time interval. Can be partial or cumulative as specified in the argument partial.
total.seeds	Total number of seeds.
intervals	The time intervals.
partial	logical. If TRUE, germ.counts is considered as partial and if FALSE, it is considered as cumulative. Default is TRUE.

Details

Mean germination percentage per unit time (\mjseqn\overlineGP) is computed as follows \insertCiteczabator_germination_1962germinationmetrics.

\mjsdeqn\overline

GP = \fracGPT_k

Where, \mjseqnGP is the final germination percentage, \mjseqnT_k is the time at the \mjseqnkth time interval, and \mjseqnk is the total number of time intervals required for final germination.

Mean number of seeds germinated per unit time (\mjseqn\overlineN) is computed as follows \insertCitekhamassi_optimal_2013germinationmetrics.

\mjsdeqn\overline

N = \fracN_gT_k

Where, \mjseqnN_g is the number of germinated seeds at the end of the germination test, \mjseqnT_k is the time at the \mjseqnkth time interval, and \mjseqnk is the total number of time intervals required for final germination.

Value

The value of mean germination percentage as % \mjseqn\mathrmtime^-1 or mean number of seeds per time interval as \mjseqn\mathrmcount \, time^-1.

References

\insertAllCited

See Also

GermPercent

Examples

x <- c(0, 0, 0, 0, 4, 17, 10, 7, 1, 0, 1, 0, 0, 0)
y <- c(0, 0, 0, 0, 4, 21, 31, 38, 39, 39, 40, 40, 40, 40)
int <- 1:length(x)

# From partial germination counts
#----------------------------------------------------------------------------
MeanGermPercent(germ.counts = x, total.seeds = 50, intervals = int)
MeanGermNumber(germ.counts = x, intervals = int)

# From cumulative germination counts
#----------------------------------------------------------------------------
MeanGermPercent(germ.counts = y, total.seeds = 50, intervals = int, partial = FALSE)
MeanGermNumber(germ.counts = y, intervals = int, partial = FALSE)

# From number of germinated seeds
#----------------------------------------------------------------------------
MeanGermPercent(germinated.seeds = 40, total.seeds = 50, intervals = int)

germinationmetrics documentation built on Aug. 19, 2023, 1:07 a.m.