iv {seedreg}

Param: Index for germination speed

Description

Calculates the emergence or germination speed index according to Maguire (1962)

Usage

iv(data, trat, nrep, time)

Arguments

data

Data.frame containing the responses of the evaluations in separate columns side by side and without the columns with the identification of the factors

trat

Vector of treatments with n repetitions

nrep

Number of repetitions

time

Vector containing time

Value

Returns the vector with the index

References

Maguire JD (1962). Seed of germination - aid in selection and evaluation for seedling emergence and vigour. J Crop Sci 2:176-177.

Examples

data("substrate")
iv(substrate[,c(3:18)],
      trat = substrate$Trat,
      nrep = 4,
      time = 1:16)