Landforms are natural features on the Earth’s surface that both reflect and shape geophysical and ecological process. The result is a defining part of landscapes that so often impact on human perception and interactions with environment. Blascyznki (1997) defines landforms as, “specific geomorphic features on the surface of the Earth,...
Field and greenhouse experiments were conducted in 1996 and 1997 to evaluate
the effects of integrating conservation tillage and cover cropping on broccoli production
as well as agroecological parameters.
A field experiment was conducted during 1996-97 at the Oregon State University
Horticulture Research farm near Corvallis, OR. The specific objectives...
Annual applications of fresh or composted dairy manure were assessed for
their effects on root rots of sweet corn and snap bean and damping-off of cucumber in
a field soil. Soil biological and physical properties were measured as possible
indicators of root rot suppressive potential. Regardless of amendment type or...
This is a bibliography of doctoral dissertations and masters' theses in forestry and related topics issued during the period from July 1981 through June 1990. The colleges and universities included are all accredited by the Society of American Foresters. The actual listings were supplied by the individual institutions. Topics covered...
Two essays are focused on crop choice and the growth of corn production in
the Corn Belt and surrounding areas. The first essay develops a partially
degenerate nested logit model to examine the effect of price islands and local
ethanol capacity on corn production and crop mix. The primary data...
Prior to advent of Europeans in the Pacific Northwest,
the Middle Columbia River Basin was the location of highly
developed native cultures. For centuries it was the center
of very important native trade networks that extended over
western North America and a site of important intertribal
rituals relating to renewal...