germinationmetrics (version 0.1.8)

GermPercent: Germination percentage

Description

Compute the following metrics:

GermPercent

Germination percentage or Final germination percentage or Germinability ista_chapter_2015germinationmetrics.

PeakGermPercent

Peak germination percentage vallance_studies_1950,roh_maturity_2004germinationmetrics.

Usage

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

Value

The germination percentage (%) value.

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.

partial

logical. If TRUE, germ.counts is considered as partial and if FALSE, it is considered as cumulative. Default is TRUE.

intervals

The time intervals.

Details

Germination percentage is computed as follows ista_chapter_2015germinationmetrics.

GP = N_gN_t 100

Where, N_g is the number of germinated seeds and N_t is the total number of seeds.

The value of N_g can be either specified using the argument germinated.seeds or is computed from the germ.counts argument.

Peak germination percentage is computed as follows vallance_studies_1950,roh_maturity_2004germinationmetrics.

PGP = N_maxN_t 100

Where, N_max is the maximum number of seeds germinated per interval.

References

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)
z <- c(0, 0, 0, 0, 11, 11, 9, 7, 1, 0, 1, 0, 0, 0)
int <- 1:length(x)

# From partial germination counts
#----------------------------------------------------------------------------
GermPercent(germ.counts = x, total.seeds = 50)
PeakGermPercent(germ.counts = x, intervals = int, total.seeds = 50)
# For multiple peak germination times
PeakGermPercent(germ.counts = z, intervals = int, total.seeds = 50)

# From cumulative germination counts
#----------------------------------------------------------------------------
GermPercent(germ.counts = y, total.seeds = 50, partial = FALSE)
PeakGermPercent(germ.counts = y, intervals = int, total.seeds = 50,
                partial = FALSE)
# For multiple peak germination times
PeakGermPercent(germ.counts = cumsum(z), intervals = int, total.seeds = 50,
                partial = FALSE)

# From number of germinated seeds
#----------------------------------------------------------------------------
GermPercent(germinated.seeds = 40, total.seeds = 50)