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Filtering by: Contributor advisor sim Bolton, Floyd E. Remove constraint Contributor advisor sim: Bolton, Floyd E.

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Yield and other agronomic characters of winter wheat cultivars as affected by five seeding rates and three different environmental conditions

Creator:

Güler, Mengü

Abstract:

Five newly released and two Eastern European winter wheat cultivars were grown under five different seeding rates (80, 160, 240, 320, 400 seeds per m²). Four of these newly released cultivars were grown at three different locations which have different environmental conditions. Data were obtained on grain yield, tiller number...

Resource Type:

Masters Thesis
Soil moisture and temperature relationships under fallow in eastern Oregon

Creator:

Russelle, Michael P.

Abstract:

Time of stand establishment is a critical factor affecting yields of winter wheat and barley in the fallow-crop rotation areas of the Pacific Northwest. Farmers in this winter-rainfall region are dependent on residual moisture in the seed zone for germination, because significant precipitation does not usually occur until after the...

Resource Type:

Masters Thesis
Effect of soil temperature, seeding date, and straw mulch on plant development and grain yield of two winter wheat and two winter barley cultivars

Creator:

Pehlivantürk, Alpaslan

Abstract:

Two winter wheat (Triticum aestivum L. em Thell) and two winter barley (Hordeum vulgare L. em Thell) cultivars were grown with and without straw mulch utilizing six different planting dates. Soil temperature was recorded continuously at seeding depth from planting date through March of the crop year. A series of...

Resource Type:

Masters Thesis
Nitrate nitrogen accumulation and distribution in the soil profile during a fallow grain rotation as influenced by different levels of soil profile moisture

Creator:

Aktan, Selman

Abstract:

The effect of different soil moisture levels on the amount and location of NO₃ -N accumulation in the soil profile were studied. The cultivars used in this study were Mcdermid, a soft white winter wheat, and Hudson, a medium early winter barley. Moisture treatments simulating dry, normal and wet fallow...

Resource Type:

Masters Thesis
Water injection into the seed zone as an aid to emergence of dryland cereals

Creator:

Estes, James Patrick

Abstract:

An adequate stand at the optimum time is an important factor affecting potential yield and soil erosion control. However, obtaining adequate stands of fall planted winter wheat in the dryland areas of the Pacific Northwest is often complicated by marginal seed zone soil moisture. The purpose of this laboratory study...

Resource Type:

Masters Thesis
Nitrate-nitrogen accumulation in the surface soil during the fallow period under different precipitation levels and tillage systems

Creator:

Senel, Atila Huseyin

Abstract:

The effects of different fallow moisture levels and tillage systems on the amount of nitrate-nitrogen accumulation in the 0-30 cm soil profile were studied. Fallow moisture treatments simulating typical dry, normal and wet precipitation cycles were established on trial plots. Data were obtained for nitrate-nitrogen, soil moisture and nitrogen mineralization...

Resource Type:

Masters Thesis
The effect of fertility level on plant growth and development, water uptake and water stress in dryland wheat production

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
Remote-sensing and geographic information system techniques to map spatial variation of wheat grain yield

Creator:

Roberts, Michael C. (Michael Coy), 1951-

Abstract:

Farmers and researchers are aware of spatial variation in grain yield within farms or fields. Fertilizer management may be improved if techniques can be developed to identify grain yield variations in wheat fields. Aerial color infrared (CIR) photography was used to identify winter wheat (Triticum aestivum L.) canopy biomass variability...

Resource Type:

Masters Thesis
Physical and physiological seed characteristics influencing wheat stand establishment

Creator:

Ahmad, Shahbaz

Abstract:

Rate of emergence is an important character for stand establishment. Ability of wheat seeds to germinate and emerge rapidly under different climatic conditions may be regulated by physical and/or physiological characteristics. Seeds of 26 wheat varieties representing five classes were produced in two different environments (Moro and Corvallis, OR). Seed...

Resource Type:

Dissertation
Response of wheat (Triticum aestivum L.) cultivars and downy brome (Bromus tectorum L.) to metribuzin and ethyl metribuzin

Creator:

Munir, Muhammad

Abstract:

Downy brome (Bromus tectorum. L.), a serious grass weed in eastern Oregon can be partially controlled in wheat by metribuzin [4-amino-6-tertbutyl- 3-(methylthio)-as triazin -5(4H)-one]. However, cultivars of many crops Lave been reported to differ in their level of tolerance to metribuzin. This lack of tolerance has led to the investigation...

Resource Type:

Dissertation

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Academic Affiliation

Crop Science11
Agronomic Crop Science3
Crop and Soil Science3

Advisor

Bolton, Floyd E.17

Commencement Year

Commencement Year range begin – Commencement Year range end

Current results range from 1975 to 1993

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Committee Member

Klein, Glenn2
Vomocil, James A.2
Boersma, L.1
Chastain, Tom1
Chilcote, David1
more Committee Members »

Creator

Roberts, Michael C. (Michael Coy), 1951 2
Agamennoni, Raul Jose1
Ahmad, Shahbaz1
Aktan, Selman1
Ashraf, Muhammad, 1952 1
more Creators »

Date

Date range begin – Date range end

Current results range from 1974 to 1992

View distribution

Decade

1990-19993
1980-19899
1970-19795

Degree Field

Crop Science13
Agronomic Crop Science3
Crop and Soil Science1

Degree Level

Master's11
Doctoral6

Degree Name

Master of Science (M.S.)11
Doctor of Philosophy (Ph.D.)6

Language

English [eng]17

Non-Academic Affiliation

Oregon State University. Graduate School17

Peer Reviewed

No17

Resource Type

Masters Thesis11
Dissertation6

Rights Statement

Copyright Not Evaluated17

Subject

Soils -- Nitrogen content4
Wheat3
Tillage2
Wheat -- Growth2
Crop yields1
more Subjects »

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