The objective of the study is to analyze empirically the demand
for hired farm labor and the elasticities of substitution of capital for
labor in the U.S., the Middle Atlantic region, the Pacific region, and
in the states of California and Oregon.
The data period 1941-1969 was analyzed for the...
This study was conducted to (1) determine and assess perceptual
differences among graduate advisors, administrators, and graduate
students regarding the roles and functions of graduate advisors;
(2) determine the appropriate roles and functions of graduate
advisors; and (3) provide constructive feedback to graduate advisors.
A sample population of 415 was...
Two case studies of 5 ecosystems were used to examine the nitrogen fixation rate of red alder (Alnus rubra Bong.), varnishleaf (Ceanothus velutinus var. laevigatus (Hook.) T. & G.), deerbrush (C. i ntegerrimus H. & A.), and snowbrush (C. velutinus var. velutinus Dougl. Ex Hook). The first case study assayed...
The adult western spotted cucumber beetle (WSCB), Diabrotica undecimpunctata
undecimpunctata Mannerheim is considered a major pest of snap beans grown for
processing in Western Oregon. Control consists of 1 or 2 insecticide sprays prior to
harvest. A commercial semiochemical-based insecticide bait, Adios TIC®, 1.3% carbaryl
+ 5% buffalo gourd root...
Texture, a critical property of Asian wheat noodles, is normally assessed by
sensory evaluation. However, sensory evaluation may be impractical for wheat breeders
and noodle researchers who need to evaluate a large number of samples and have limited
sample. Instrumental Texture Profile Analysis (TPA) has been widely employed to
evaluate...
The seasonal biology of the obliquebanded leafroller, Choristoneura rosaceana (Harris), was studied to improve its management in Mid-Columbia area sweet cherry orchards. Overwintering OBLR larvae began to emerge from hibernacula at bud stage 2 (side green). Most overwintering larvae emerged from hibernacula within three weeks of first bud swell and...
The Colorado potato beetle (CPB), Leptinotarsa decemlineata (Say), is the most devastating foliage-feeding pest of potatoes in the United States. Potential biological control agents include the nematodes Heterorhabditis marelatus Liu & Berry and Steinernema riobrave Cabanillas, Poinar & Raulston, which provided nearly 100% CPB control in previous laboratory trials. In...