The various elements of physical geography are commonly
entertained as factors retarding the mineral industries of Alaska. It
has been shown by numerous writers that the mineral industries of
Alaska are, indeed, in a difficult situation. Only the petroleum industry
and sand and gravel for construction are of much significance...
Re searchers have long tried to correlate weather factors with plant disease occurrences. However, inconclusive results have usually been obtained because most plant diseases have biologic as well as climatic optimums.
In this study, thirty weather variables were correlated, by the stepwise regression method in a computer, to the amount...
This investigation has analyzed and described the impact of
place on one of man's activities -- the production of sugar beet seed.
It is apparent that in this activity man's relationship to the earth is
especially close and dependent upon a number of factors. These
are localizing factors. Sugar beets...
This study examines the impact of the recently constructed
limited- access highway, Interstate 5, on agricultural land in Linn
County, Oregon. More specifically it scrutinizes the quality and
quantity of the land relinquished to the highway right -of -way; the
effects on field boundaries, connectivity, mobility, drainage, land
use, miscellaneous...
Taking advantage of a favorable physical system but also risking the hazards of flooding, man has long occupied flood plain land. He has attempted to adjust rivers to his needs in order to reduce flood loss, but the rising cost of flood protection accompanied by an increase in flood damage...
Jackson County, Oregon is noted for the production of high quality
pears. It is the fourth leading pear producing county in the United
States and is the number one producer of winter pears. This thesis
analyzes in detail the many aspects of the pear industry in the county.
Climate, soils,...