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Creator:: Alexander, William Larry
Abstract:: The major objective of this study was to determine why certain winter wheat cultivars, when hybridized, will produce a greater proportion of desirable plants in subsequent, segregating generations. Three winter wheat parents were chosen as the experimental material, based on their known performance as parents. Yamhill and Pullman Selection 101...
Resource Type:: Dissertation
Full Text:: OF William Larry Alexander for the degree of Doctor of Philosophy in Crop Science presented on

Creator:: Keim, Don Lee
Abstract:: Winter wheat cultivars (Triticum aestivum) were evaluated for their response to water stress and adaptability to a wide range of moisture limited environments. Grain yield was analyzed for ten cultivars at six locations across four years. Regression of the cultivar mean on the year-location mean was used as a measure...
Resource Type:: Dissertation
Full Text:: . Appreciation is extended to Dr. Larry Boersma and Dr. E. W. Ross Barlow for their ideas throughout this study

Creator:: Fazilat, Mohammad
Abstract:: The effect of soil temperature and soil water suction on the rate of phosphorus uptake and growth rate of wheat (Triticum aestivum VILL. , Host) was studied. Plants were grown in perlite slabs separated from an osmotic solution by a semi-permeable membrane. Measurements were made at temperatures of 10.0, 18.3,...
Resource Type:: Masters Thesis
Full Text:: his helpful suggestions. The author wishes to express his deep appreciation to Dr. Larry Boersma for

Creator:: Sepaskhah, Ali Reza
Abstract:: The effect of soil temperature and plant water stress on nitrogen uptake, growth rate and transpiration rate of wheat (Triticum aestivum VILL. , Host) seedlings was studied. A special apparatus for the control of plant water stress and root temperature was used. Leaf area was measured by the air flow...
Resource Type:: Masters Thesis
Full Text:: for Ali Reza Sepaskhah ACKNOWLEDGMENTS The author wishes to acknowledge deeply Dr. Larry Boersma

Creator:: Valverde, Bernal E.
Abstract:: A series of experiments were conducted from 1983 to 1985 to determine the effects of dinoseb [2-(1-methylpropyl)-4,6-dinitrophenol] on winter wheat (Triticum aestivum L. em Thell) yields. Field trials on dinoseb timing and dinoseb plus supplemental pesticides were established in an effort to elucidate the possible factors involved in the yield...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Bernal E. Valverde for the degree of Master of Science in Crop Science

Creator:: Agamennoni, Raul Jose
Abstract:: Dryland winter wheat in eastern Oregon is usually subjected to water stress several times during the growing period. Moreover, the last three months of growth period depend strongly on the available soil water. The fertility level, stage of growth, availability of soil water and climatic conditions all interact to determine...
Resource Type:: Masters Thesis
Full Text:: recieve due recognition: Dr. Larry L. Boersma, Dr. Hugh E. Gardner, Dr. David B. Hannaway, Dr. Dale N

Creator:: Figuerola, Luis Fernan
Abstract:: Several studies were conducted to determine the influence of various environmental factors on the toxicity of 2-tert.butylamino- 4-ethylamino-6-methylthio-s-triazirxe (Igran) to winter wheat. The effect of temperature on Igran toxicity was studied by growing wheat plants in pots submerged in water baths to control soil temperature and in controlled-environment chambers. Igran...
Resource Type:: Dissertation
Full Text:: . Larry Boersma for his valuable counseling and the use of the infrared gas analyzer. Dr. Grant E

ScholarsArchive@OSU