unif_1 {SeedCalc}

Seedling Uniformity Index

Description

It calculates the Seedling Uniformity Index (Sako, 2001).

Usage

unif_1(lengths)

Arguments

lengths

A data.frame object containing seedling lengths data with four columns. The first and second columns are for identification, e.g. treatments and repetitions. The third is the shoot length and the fourth is the root lenght.

References

SAKO, Y.; MCDONALD, M. B.; FUJIMURA, K.; EVANS, A. F.; BENNETT, M. A. A system for automated seed vigour assessment. Seed Science and Technology, v. 29, n. 3, p. 625-636, 2001.

Examples

Seedling <- data.frame(
LOTE = c(1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2),
REP = c(1, 1, 1, 1, 2, 2, 2, 1, 1, 1, 1, 2, 2, 2, 2),
SH = c(0.00, 2.77, 1.18, 1.07, 0.80, 2.65, 3.51, 0.64, 2.77, 1.18, 1.07, 0.80, 2.65, 3.51, 1.98),
ROOT = c(4.86, 6.71, 7.88, 3.68, 9.68, 8.88, 9.85, 4.86, 6.71, 7.88, 3.68, 9.68, 8.88, 9.85, 8.75)
)
print(Seedling)
Unif <- unif_1(Seedling)
Unif