Combined Split-Split-Plot Analysis over Environments — anova_sspd

Combined (pooled) analysis of a split-split-plot experiment repeated in several environments, with environments fixed and replications random within environments. See anova_spd_pooled.

Usage

anova_sspd_pooled(
  data,
  response,
  main_plot,
  sub_plot,
  sub_sub_plot,
  environment,
  replication,
  verbose = TRUE,
  posthoc = "lsd",
  alpha = 0.05
)

Arguments

data: Data frame containing the combined data.
response: Name of the response variable.
main_plot: Name of the main-plot factor.
sub_plot: Name of the sub-plot factor.
sub_sub_plot: Name of the sub-sub-plot factor.
environment: Name of the environment column.
replication: Name of the replication column.
verbose: Logical. If TRUE (default), prints the report.
posthoc: Method for the letters (default "lsd").
alpha: Significance level. Default 0.05.

Value

An object of class aridagri_sspd_pooled; see anova_spd_pooled. Also contains subsub_means.

Author

Lalit Kumar Rolaniya, Ram Lal Jat, Monika Punia, Raja Ram Choudhary, Hemant Poonia

Examples

data <- expand.grid(env = c("E1", "E2"), rep = 1:3, A = c("A1", "A2"),
                    B = c("B1", "B2"), C = c("C1", "C2"))
set.seed(8)
data$yield <- rnorm(nrow(data), 1200, 90)
res <- anova_sspd_pooled(data, "yield", "A", "B", "C", "env", "rep",
                         verbose = FALSE)
res$anova_table
#>           Df      Sum Sq    Mean Sq   F value     Pr(>F)
#> env        1  22934.2419 22934.2419 1.6537586 0.26784180
#> rep(env)   4  55471.7992 13867.9498        NA         NA
#> A          1   1997.9245  1997.9245 0.1718856 0.69971131
#> env:A      1   6097.5511  6097.5511 0.5245849 0.50898738
#> Error(a)   4  46494.2975 11623.5744        NA         NA
#> B          1   1952.9792  1952.9792 0.1809301 0.68178614
#> env:B      1  19087.5742 19087.5742 1.7683328 0.22025261
#> A:B        1   3435.7088  3435.7088 0.3182948 0.58809762
#> env:A:B    1   1359.1013  1359.1013 0.1259114 0.73188212
#> Error(b)   8  86352.8608 10794.1076        NA         NA
#> C          1   2193.2727  2193.2727 0.3390368 0.56850077
#> env:C      1   1189.5573  1189.5573 0.1838822 0.67377558
#> A:C        1   1296.2490  1296.2490 0.2003746 0.66041981
#> B:C        1  17548.5227 17548.5227 2.7126564 0.11905144
#> env:A:C    1   1083.4479  1083.4479 0.1674797 0.68778748
#> env:B:C    1  12333.2535 12333.2535 1.9064784 0.18633913
#> A:B:C      1  24610.3775 24610.3775 3.8042802 0.06886361
#> env:A:B:C  1    223.5847   223.5847 0.0345618 0.85485336
#> Error(c)  16 103506.0563  6469.1285        NA         NA