douglas: Multi-site Douglas-fir dataset
In skayondo/breed_forest: Statistical Methods for Forest Genetic Resources Analysts

Provenance test with measurements of height and circumference

A dataframe with 1021 individuals and the following 9 variables

self id of the tree
dad id of sire or 0 if unknown
mum id of dam or 0 if unknown
orig factor origin of the seeds with 11 levels partially crossed with site
site factor site with 3 levels
block factor block with 127 levels nested within site
x, y coordinates (in m)
H02:H05heights as measured in 2002-2005
C13 circumference as measured in 2013
AN factor angle quality with 5 levels
BR factor branching quality with 5 levels

The dataset includes measurements of height, circumference, angle and branching, for a progeny from 11 different origins which were planted in 1998 in 3 different sites.

Only 4 out of 11 origins are available in all the three sites.

Circumference was measured in all the three sites in 2013, but measurements of height were taken in 2002, 2003 and 2004 for site 3, and in 2005 for site 2. Measurements of angle and branching are only available for site 3.

The spacing between trees is different among sites, and in general between rows and columns. Coordinate units are meters.

data(douglas)

## Individuals by origin and site
with(douglas, table(orig, site))

## Measurements by variable and site
library(tidyr)
library(dplyr)
douglas %>%
 gather(variable, value, H02:BR, na.rm = TRUE) %>% 
 with(., table(variable, site))
 
## Visualise trials
library(ggplot2)
ggplot(douglas, aes(x, y)) +
  geom_point() + 
  facet_wrap(~ site)