The overall objective of the research reported here is to
empirically measure the ability of farmers to mitigate the impact of
rising electricity prices by substituting relatively inexpensive
alternative inputs. A dual cost methodology is employed because it
allows theoretically consistent derivation of own price and factor
substitution elasticities, conditional...
As a preliminary step toward the establishment of a
70 mm. aerial photo timber inventory system capable of
generating accurate stand tables, stock tables, and gross
volume estimates, this project focuses on the development
of a system which (1) eliminates the need to measure tree
height on the photos through...
"An important limitation In the study of tree roots has traditionally been the time necessary to excavate roots without injuring their fine structure. Thus, many root studies have been based on small samples and consequently contain large errors of estimation. This Note describes how large numbers of root systems from...
The vegetation of a 420 square mile area of the
Oregon Coastal Mountain Range was mapped using data from
the multispectral scanner system aboard Landsat.
Advantages of this mapping system include rapid synoptic
coverage of the same geographic area at different
periods in time at a reduced cost compared to...
Aerial application of fosamine ammonium or glyphosate at moderate rates was not adequate for controlling understory brush before final harvesting of mature Douglas-fir (Pseudotsuga menziesii) stands or for reducing vigor of post-harvest sprouting. Symptoms of herbicide injury were those associated with low application rates, suggesting that the canopy intercepted too...
Trees in a Douglas-fir stand infested with western spruce budworm were treated with a systemic insecticide to protect cone and seed production at three locations in Montana during 1983. Treatments applied were (1) acephate as an Acecap implant, (2) acephate as an Inject-A-Cide injection, and (3) control. Potential cone-bearing trees...