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Filtering by: Creator Stevenson, John Committee Member Fisher, Glenn Degree Level Master's

Nitrogen fertilization of winter wheat grown in four rotations in western Oregon

Creator:

Sebastian, Kevin D.

Resource Type:

Masters Thesis

Full Text:

: Russell S. Karow John M. Hart Accurate assessment of nitrogen (N) fertilizer requirements could result
Ion exchange membranes and agronomic responses as tools for assessing nutrient availability

Creator:

Salisbury, Steven Earl

Abstract:

Winter wheat is commonly grown in rotation with leguminous and non-leguminous crops in the Willamette Valley. For agronomic, economic, and environmental reasons it is important to understand the influence of previous crops on availability of N and other nutrients. Objectives of this study were: (1) to evaluate the effects of...

Resource Type:

Masters Thesis

Full Text:

. He is an excellent advisor and a good friend. John Hart, who served as a committee member, for
Effects of tillage on emergence of mint root borer, Fumibotys fumalis Guenée, and on other agronomic factors in peppermint, Mentha piperita L.

Creator:

Talkington, Michael Lee

Abstract:

Studies were conducted in the Willamette Valley of western Oregon to evaluate the effects of plowing (7.5-15 cm deep) and disking (5-10 cm deep) in peppermint, Mentha piperita L., on the following factors: 1) emergence of adult "mint root borer", Fumibotys fumalis Guenée; 2) suppression of common groundsel, Senecio vulgaris...

Resource Type:

Masters Thesis

Full Text:

, Yield and Oil Quality Commercial production of peppermint was described by Sievers and Stevenson
Biology, distribution and economic threshold of the strawberry root weevil, Otiorhynchus ovatus (L.), in peppermint

Creator:

Cacka, Joseph Francis

Resource Type:

Masters Thesis

Full Text:

. Stahancyk, and Mr. D. Stevenson for the use of their private acreage where much of the study was conducted