Ovipositional behavior of the codling moth, Laspeyresia pomonella (L.), on several varieties of apples and pears grown in the Pacific Northwest was investigated during the spring/summer of 1979. Field studies showed that early in the season more eggs were laid on the Bosc variety than on several other apple and...
Arthropod communities in pear are conceptualized as hierarchically
organized systems in which several levels of organization or subsystems
can be recognized between the species population level and the community
as a whole. An individual tree is taken to be the community habitat with
arthropod subcommunities developing on leaf, fruit and...
This research analyzed the relationships of agricultural field burning policies, and other economic factors, with the quantity of land devoted to grass seed production in counties of the Willamette Valley, Oregon. The thesis describes the background of the grass seed industry, field burning and government policies concerning field burning in...
Rawinsonde observations taken during the National Hail Research Experiment are analyzed by multiple-linear regression techniques to study the influence of environmental factors on hailstorm severity. The latter is inferred from integrated radar returns. The roles of mixed-layer flow and thermodynamic properties as well as upper tropospheric kinematic properties are emphasized....
A variety of studies were conducted by some 13 states and agencies to
attempt to validate or develop parameters for using chromic oxide to determine
intake and digestibility of the grazing ruminant animal.
Recovery trials were conducted under a variety of experimental conditions,
ranging from confinement to grazing trials under...