In an agrisilviculture system, trees and crops compete for above and below ground resources. This study aimed at quantifying the effect of shoot pruning and root barriers around pollarded trees on the production of crop and tree components with and without application of fertilizer to the crop. Sorghum (1991 &...
The effect of defoliation intensity and season on Douglas-fir growth
were studied in three replications in the Siuslaw National Forest during
1988-1990. Four intensities of defoliation were applied once in either spring or
summer 1988. Stem diameter and canopy area were linearly inversely
proportional to the level of defoliation. Defoliation...
Bunt or stinking smut is a major disease of wheat. In the U.S.
common bunt, Tilletia caries (DC) Tul. and T. foetida (Wallr) Liro,
is a threat to wheat production in the Pacific Northwest. Screening
trials conducted by USDA Cereal Investigations Project in Oregon,
from 1955-1980, revealed that a number...
Three chemicals SD 55446, SD 55447 and WL 84245 were found to
induce male sterility in cultivars of wheat or triticale. Both SD 55446
and SD 55447 when applied at a concentration of 0.896 kg/ha resulted
in 90% male sterility. However, SD 55447 caused female sterility at
the same concentration...
This research was conducted in the Mamora cork oak
forest of Morocco to: (1) Describe the impacts of sheep
grazing (none, 35% use, 70% use) in March, April, May and
June of 1987 and 1988 on seasonal forage production; (2)
evaluate the effects of these factors on annual changes
in...
Misclassification introduced by fallible measurements
affects the estimate of the proportion in a class as
well as the comparison of proportions in different classes.
In this thesis the magnitude of effects of misclassification
and the importance of misclassification error rates on
estimates of proportions and variances of these estimates
were...
The ability of Propionibacterium shermanii to produce
growth metabolites which were inhibitory to food spoilage
indicator organisms was investigated. Asperqillus niqer,
a Pseudomonas species and Kluyveromyces fraqilis were the
spoilage indicators chosen to represent molds, gram
negative psychrotrophic bacteria and yeasts, respectively.
Supplementation of milk or whey based media was...
This report is an exposition of an eleven week training
internship in the Port of Portland (POP). My interest in serving
an internship at POP came as a result of a field trip in the
spring of 1980 during which I was fascinated by the ports operations
and diversity. During...
