Skip to Content

Switch language English
- Switch language
- Deutsch
- English
- Español
- Français
- Italiano
- Português do Brasil
- 中文
Login

ScholarsArchive@OSU

Home
About
Help
Contact

Search ScholarsArchive@OSU

Advanced Search

Search Constraints

Start Over

Filtering by: Creator Summers, Ed Remove constraint Creator: Summers, Ed Academic Affiliation Crop and Soil Science Remove constraint Academic Affiliation: Crop and Soil Science Non-Academic Affiliation Oregon State University. Graduate School Remove constraint Non-Academic Affiliation: Oregon State University. Graduate School

« Previous | 1 - 10 of 60 | Next »

Relevance
Title [A-Z]
Title [Z-A]
Date Created ▼
Date Created ▲
Date Uploaded ▼
Date Uploaded ▲

Number of results to display per page

10 per page
20 per page
50 per page
100 per page

View results as:

List Gallery Masonry

Search Results

Seedling recruitment of hairy nightshade and other summer annual weeds in irrigated row crops

Creator:

Peachey, Ronald Edward

Abstract:

This study evaluated the effects of tillage system, rotational tillage sequences, and winter seed burial depth on weed seedling recruitment in irrigated cropping systems. Notill (NT) planting of vegetable crops reduced emergence of hairy nightshade by 77 to 99% and Powell amaranth emergence from 50 to 87% compared to conventional...

Resource Type:

Dissertation

Full Text:

Recruitment of Hairy Nightshade and Other Summer Annual Weeds in Irrigated Row Crops Abstract approved
Impact of a red clover winter cover crop on carbon and nitrogen mineralization by microorganisms in soil aggregates

Creator:

Ndiaye, Aissatou

Abstract:

Although legumes have been widely studied for their nitrogen-fixing ability, it is uncertain to what extent legume cover crops achieve their nitrogen-fixing potential under the climatic conditions encountered in western Oregon. Furthermore, it is unknown what factors control the proportions of legume cover crop N that are either sequestered into...

Resource Type:

Masters Thesis

Full Text:

to the N requirements of the following summer crop. Soil was sampled in mid-September 1997, after
Nitrate and water under terraced dryland wheat production in Oregon

Creator:

Strock, Jeffrey S.

Abstract:

Dry land agriculture using summer fallow is a common crop production practice in the Columbia Plateau region of eastern Oregon. Farmed-over level terraces are used to control surface water runoff and soil erosion. More than 70 percent of the average annual precipitation around Pendleton, Oregon (350 - 400 mm) falls...

Resource Type:

Masters Thesis

Full Text:

in Oregon. Abstract approved: Benno P. Warkentin Dry land agriculture using summer fallow is a
Monitoring potato leafroll virus movement in differentially aged potato (Solanum tubersom L.) plants with an immunosorbent direct tissue blotting assay

Creator:

Whitworth, Jonathan L.

Abstract:

Potato leafroll virus (PLRV) causes yield and quality losses in potato. PLRV is identified by plant symptoms and serological tests such as an enzyme-linked immunosorbent assay (ELISA). A similar serological test, direct tissue blotting assay (DTBA), was used to detect and monitor PLRV movement in field-inoculated Russet Burbank plants and...

Resource Type:

Dissertation

Full Text:

tests of summer-infected tubers approximated those of ELISA and visual inspections. Indirect DTBA
Performance of perennial ryegrass (Lolium perenne L.) seed crops under water stress conditions

Creator:

Velloza, Theodosius Marmaduke

Abstract:

Summer drought is a major factor limiting the regrowth of perennial ryegrass seed crops. This phase of crop development has a strong influence on seed yield because most of the tillers that contribute towards next season's seed crop are produced or regrown during this period. In recent years many seed...

Resource Type:

Dissertation

Full Text:

important adaptive response for summer survival (McWilliam and Kramer, 1968). Extremely dry summers as
Winter cover cropping effects on integrative biological indicators of soil quality

Creator:

Ndiaye, Evelyne L.

Abstract:

Responses of biological indicators of soil quality to winter cover cropping were measured on soil samples collected from 6 commercial growers' fields and two experiment research stations in the Willamette Valley of Oregon. The research stations were the North Willamette Research and Extension Center (Aurora, OR), and the Oregon State...

Resource Type:

Masters Thesis

Full Text:

sites compared winter cover crops or winter fallow in rotation with a summer vegetable crop. In one on
Seed quality and plant establishment studies of seashore paspalum (Paspalum vaginatum Sw.)

Creator:

Baker, Stanley D.

Abstract:

Seashore paspalum (Paspalum vaginatum Sw.) is an important warm-season perennial turfgrass, known for its tolerance to salinity. Turfgrass is used for homes, municipalities, sod farms, resorts, and sports fields. Seashore paspalum has historically been planted in sub-tropical and tropical climates because of its heat tolerance. Seashore paspalum could become an...

Resource Type:

Dissertation

Full Text:

Valley (OWV) if summer temperatures increase because of climate change. Typically, seashore paspalum
Determinants of microbial community structure and substrate utilization potential in soils of vegetable cropping systems

Creator:

Schutter, Mary E.

Abstract:

The Oregon Long-Term Soil Quality Project was initiated to identify soil properties that respond rapidly to alternative management practices. Such practices included winter cover cropping, which was implemented at two experimental research stations and several grower fields throughout the Willamette Valley. The goal of this thesis was to identify the...

Resource Type:

Dissertation

Full Text:

summer months. Community patterns across different sizes of soil aggregates also were assessed. Biolog
Role of a grass riparian zone in controlling the fate of nitrogen in a poorly drained agricultural landscape

Creator:

Davis, Jennifer H.

Abstract:

Riparian ecosystems, through their unique positions in the agricultural landscape, have the potential to mitigate nutrient loading to streams. This study was conducted to gain a better understanding of N cycling in a poorly drained Grass Riparian Zone (GRZ) and adjacent Perennial Ryegrass seed Field (PRF) in the Willamette Valley,...

Resource Type:

Dissertation

Full Text:

summer. Shallow (30-45 cm) and deeper (135-150 cm) soil water NO3 concentrations were higher in the PRF
Small broomrape (Orobanche minor) biology and management in red clover (Trifolium pratense) seed production

Creator:

Lins, Ryan D.

Abstract:

Small broomrape (Orobanche minor) is a parasitic weed that attaches to the roots of red clover (Trifolium pratense). Small broomrape invasion presents a significant threat to the future of red clover seed production in Oregon. This study was conducted to investigate and develop small broomrape management options for red clover...

Resource Type:

Dissertation

Full Text:

by the following summer. Red clover fall interseeded with wheat produced enough ground cover for

« Previous
Next »
1
2
3
4
5
6

Limit your search

Academic Affiliation

Crop and Soil Science[remove]60
Botany and Plant Pathology1
Forest Ecosystems and Society1

Advisor

Dick, Richard P.7
Karow, Russell S.4
Myrold, David D.4
Bottomley, Peter J.3
Chastain, Thomas G.3
more Advisors »

Commencement Year

Commencement Year range begin – Commencement Year range end

Current results range from 1992 to 2017

View distribution

Committee Member

Myrold, David5
Baham, John3
Hart, John3
Selker, John3
Bottomley, Peter2
more Committee Members »

Creator

Baloch, Dost M.2
Al Ismaily, Said S.1
Allen, Natalie M.1
Baker, Stanley D.1
Bandick, Anna Katrina1
more Creators »

Date

Date range begin – Date range end

Current results range from 1991 to 2017

View distribution

Decade

2010-201915
2000-200918
1990-199927

Degree Field

Soil Science31
Crop Science28
Botany and Plant Pathology1
Crop and Soil Science1
Forest Ecosystems and Society1

Degree Level

Master's34
Doctoral26

Degree Name

Master of Science (M.S.)34
Doctor of Philosophy (Ph.D.)26

File Format

application/pdf4

Language

English [eng]60

License

All rights reserved26

Location

Malheur, Oregon, United States, (Administrative Boundary)1

Non-Academic Affiliation

Oregon State University. Graduate School[remove]60

Peer Reviewed

No55

Resource Type

Masters Thesis34
Dissertation26

Rights Statement

Copyright Not Evaluated30
In Copyright30

Subject

Soils -- Nitrogen content4
Nitrogen fertilizers -- Oregon3
Cover crops -- Oregon2
Denitrification -- Cascade Range2
Denitrification -- Oregon2
more Subjects »

Scholars Archive is a service of Oregon State University Libraries & Press

121 The Valley Library
Corvallis, OR 97331-4501

Contact Us
Services for Persons with Disabilities

Powered by Hyrax 3.6.0

Copyright © 2018 Oregon State University
Licensed under the Apache License, Version 2.0

Core Trust application (pdf)