unif_2 {SeedCalc}

Seedling Uniformity Index

Description

It calculates the Seedling Uniformity Index (Christiansen, 1942; adapted for Castan et al., 2018).

Usage

unif_2(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

CASTAN, D. O. C.; GOMES-JUNIOR, F. G.; MARCOS-FILHO, J. Vigor-S, a new system for evaluating the physiological potential of maize seeds. Scientia Agricola, v. 75, n. 2, p. 167-172, 2018.

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_2(Seedling)
Unif