CASE STUDIES IN BIOMETRY: Chapter 5.

Estimating Pine Seedling Response to Ozone and Acid Rain

John O. Rawlings and Susan E. Spruill

The data set ch5.dat contains the following variables:

1.  site: coded 1-6 corresponding to the location code used in Table 1.
2.  block: block within site coded 1, 2, ... within sites for the RCB designs;
    block=1 for all observations for the CRD designs, sites 5 and 6.
3.  rep: replication within site coded as missing in sites 1-4;
    coded as 1, 2, ... for replicates in the CRD design.
4.  ozone: target ozone treatment, coded 0.0=charcoal filtered air, 
    1.0=nonfiltered air, "x.x"=target level of ozone as multiple of 
    ambient ozone level.
5.  rain:  acidic rain treatment, coded as pH of rain solution.
6.  fam:  genetic family, coded as 1, 2, ... within sites.
7.  ppmhrs:  cumulative ozone exposure (ppm-h) during the two years of
    the trials.
8.  vwpH:  cumulative exposure to acidic rain computed as vwpH 
    = -log(sum(volume*hydrogen ion concentration)).
9.  biomass:  total above ground biomass (g) after two growing seasons.
10. diam:  increment of diameter growth (mm) during the two growing seasons.
11. DMA:  whole-plot component of the covariate initial diameter (mm)
    expressed as the deviation of the whole-plot mean from the overall
    site mean.
12. DMB:  sub-plot component of the covariate initial diameter (mm)
    expressed as the deviation of the subplot mean from the whole-plot mean.
13. D2HA: whole-plot component of the covariate initial volume, 
    approximated as diameter squared times height, and expressed as
    the deviation of the whole-plot mean from the overall site mean.
14. D2HB:  sub-plot component of the covariate initial volume and
    expressed as the deviation of the subplot mean from the whole-plot mean.
15. DMOT:  depth to mottling (cm) of the clay soil; one measurement
    per whole-plot. 

Missing data are coded with '.'


NOTE:  The authors have on file letters of permission from
each of the principal investigators to use the SCFRC data
in a chapter in the book entitled CASE STUDIES IN BIOMETRY,
and for the data used in this case study to
be made available to the readers.