Nitrogen is one of the most important nutrients influencing
potato yields. The potential for environmental pollution from N is
also greater than for other nutrients added as fertilizer because
excessive amounts applied are subject to leaching into drainage water.
The purpose of this study was to improve N fertilizer recommendations...
Published January 1959. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
As a key historic component of prairies in the Pacific Northwest, Camassia spp. should play a role in the restoration of these ecosystems. To do so effectively, further study of Camassia spp. propagation is warranted. Thus, the growth, N uptake and allocation, and seasonal thermoperiodicity of Camassia spp. was examined....
Foliar applications of urea-ammonium nitrate (UAN) around anthesis increased seed protein content by about 40% in 1983 and 1984 in 'Scio' barley (Hordeum vulgare L.). In exploring the mode and the mechanism of this increase, agronomic and physiological studies were conducted. The late N applications did not affect yield or...
Nitrogen deficiency during the winter where winter wheat
(Triticum aestivum L.) follows wheat and large amounts of straw
have been plowed down has been a factor limiting yield in the
Willamette Valley of western Oregon. Field experiments were
established to determine if an application of N on the stubble or...
Nitrogen fertilization of seedling legumes is a controversial practice intended to provide N to the plant during periods when seed N, soil N, and N₂ fixation may not meet plant requirements; eg. prenodulation, postharvest, or in the event of an inoculation failure. Field experiments were conducted in 3 consecutive years...
Douglas-fir (Pseudotsuga menziesii Mirb. Franco)
seedlings at a nursery in western Oregon were fertilized
with nitrogen in October. Free amino acid (FAA) and total
nitrogen concentrations in needles, stems and fine roots
were followed from before fertilization until just prior
to budbreak the following spring. Before budbreak in
mid-March, the...
