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Upper Flat Creek cruise data
Description
These are forest measurement data from the Upper Flat Creek unit of the University of Idaho Experimental Forest, measured in 1991. The inventory was based on variable radius plots with 6.43 sq. m. per ha. BAF (Basal Area Factor). The forest stand was 121.5 ha.
Usage
data(ufc)Format
A data frame with 633 observations on the following 12 variables.
- Plot
plot label
- Tree
tree label
- Species
species kbd
- Dbh
tree diameter at 1.37 m. from the ground, measured in millimetres.
- Height
tree height measured in decimetres
- Height.ft
tree height converted to feet
- Dbh.in
tree diameter converted to inches
- Height.ft.p
predicted tree height in feet
- Height.m
tree height in metres
- Height.m.p
predicted tree height in metres
Details
Plots that were measured with no trees are signified in the dataset by lines that have blank species codes and missing DBH.
Source
The data are provided courtesy of Harold Osborne and Ross Appelgren of the University of Idaho Experimental Forest. The predicted height comes from the height/diameter model documented in Wykoff et al. (1982). The data and model were used in Robinson et al. (2005).
References
Robinson, A.P., R.A. Duursma, and J.D. Marshall. 2005. A regression-based equivalence test for model validation: shifting the burden of proof. Tree Physiology 25, 903-913.
Wykoff,W.R., N.L. Crookston, and A.R. Stage. 1982. User's guide to the stand Prognosis model. GTR-INT 133, USDA Forest Service, Intermountain Research Station, Ogden, UT, 113 p.
Examples
data(ufc)