PASWR (version 1.0)

sunflower: Sunflower Defoliation

Description

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.

Usage

sunflower

source

Muro, J., et. al. (2001) Defoliation Effects on Sunflower Yield Reduction. Agronomy Journal, 93: 634-637.

References

Ugarte, M. D., Militino, A. F., and Arnholt, A. T. (2008) Probability and Statistics with R. Chapman & Hall/CRC.

Examples

attach(sunflower)
summary(aov(yield~stage+defoli+stage:defoli))
detach(sunflower)