One traditional problem in forest management is to
find the optimal stand level management regime. Four
important silvicultural practices including precommercial
thinning, commercial thinning, fertilization and regeneration
harvest are considered jointly in this study. The
partial analyses, i.e. considering some of the silvicultural
practices, are also discussed.
The inability to...
Regression models of height growth and survival were fitted to aggregate data for trees, protected and not protected from animal damage, that had been surveyed on Douglas-fir and ponderosa pine plantations in Oregon and Washington. Animal damage significantly affected both height and survival. Dynamic programming analysis-using both soil expectation (Se)...
An experimental investigation of the thermohaline, diffusive interface between convecting layers, with heat fluxes more similar to natural fluxes than in previous studies, shows that the formula suggested by Huppert (1971) for the dependence of heat flux on interface stability cannot be extrapolated to stability numbers higher than seven and...
A year-long caged study the belted kingfisher (Megaceryle
alcyon) combined time-budget and food-balance techniques to obtain
data on daily energy consumption (DEC) throughout an annual cycle.
This study tested the hypothesis that seasonal variations in DEC
could be predicted as a function of temperature, photoperiod, and
timed-activity data. The DEC...
The effect of lifting date and root-pruning treatments on
water potential, root regeneration, and shoot growth of six-month-old
and three-year-old Douglas-fir seedlings bare-root transplanted
into a growth chamber, and sawdust bed, respectively, was studied.
Root growth in six-month-old and three-year-old seedlings was
highest in February and August respectively. Survival was...
The life history and wing pattern variation of the intertidal
shore bug, Saldula palustris (Douglas), were studied in field and
experimental populations from June 1970 until February 1972.
The study site was an estuarine salt marsh on Yaquina Bay
near Toledo, Oregon. The insects live below mean high water level...