sunflower {PASWR} | R Documentation |
Seventy-two field trials were conducted by applying four
defoliation treatments (non defoliated control, 33%, 66%, and
100%) at different growth stages (stage
) ranging from
pre-flowering (1) to physiological maturity (5) in four different
locations of Navarra, Spain: Carcastillo (1), Melida (2),
Murillo (3), and Unciti (4). There are two response variables:
yield
in kg/ha of the sunflower and numseed
,
the number of seeds per sunflower head. Data are stored in the
data frame sunflower
. Data used in Case Study: Sunflower
defoliation from Chapter 11.
sunflower
A data frame with 72 observations on the following 5 variables:
location
A
, B
,
C
, and D
for locations Carcastillo, Melida,
Murillo, and Unciti respectivelystage
stage1
, stage2
,
stage3
, stage4
, and stage5
defoli
control
, treat1
,
treat2
, and treat3
yield
numseed
Muro, J., et. al. (2001) “Defoliation Effects on Sunflower Yield Reduction.” Agronomy Journal, 93: 634-637.
Ugarte, M. D., Militino, A. F., and Arnholt, A. T. (2008) Probability and Statistics with R. Chapman & Hall/CRC.
attach(sunflower) summary(aov(yield~stage+defoli+stage:defoli)) detach(sunflower)