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Filtering by: Subject Soils -- Phosphorus content Remove constraint Subject: Soils -- Phosphorus content Committee Member Baham, John Remove constraint Committee Member: Baham, John

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Transformations of sulfur in wetland rice soils

Creator:

Islam, M. Mujibul

Resource Type:

Dissertation

Full Text:

aerobic flooding cycles. Figure 7.6. Effect of added organic residues on the ester S content in soil
Sulfur oxidation and rhodanese activity in soils

Creator:

Deng, Shiping

Resource Type:

Masters Thesis

Full Text:

). Unlike the other four soils, the coarse-textured soil (Quincy) high in sand content (>89% sand) had
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:

matter content of a soil and the degree of aggregate stability. Good soil structure for crop growth
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:

MATERIALS AND METHODS 30 Location 30 Measurements 31 Soil sampling 31 Soil moisture content 32
Effects of timing and duration of flooding on phosphorus release in four restored wetlands around Agency and Upper Klamath Lakes, Oregon

Creator:

Stevens, Carla J.

Abstract:

Upper Klamath Lake (UKL) and Agency Lake in south-central Oregon are hypereutrophic due to phosphorus (P) loading from both geologic and agricultural sources in the watershed. Restoring historic lake-fringe wetlands to provide P sinks around the lakes has been accepted as a favorable means of reducing lake P levels and...

Resource Type:

Masters Thesis

Full Text:

………………………………………………….....16 5. Total phosphorus released by temperature treatments as percentage of total soil

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Academic Affiliation

Crop and Soil Science3
Soil Science1

Advisor

Dick, Richard P.2
Bottomley, Peter J.1
Tullos, Desiree1
Warkentin, Benno P.1

Commencement Year

Commencement Year range begin – Commencement Year range end

Current results range from 1990 to 2009

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Committee Member

Baham, John[remove]5
Bachelet, Dominique1
Boersma, Larry1
Bottomley, Peter1
Clough, George1
more Committee Members »

Creator

Deng, Shiping1
Islam, M. Mujibul1
Ndiaye, Aissatou1
Stevens, Carla J.1
Strock, Jeffrey S.1

Date

Date range begin – Date range end

Current results range from 1990 to 2008

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Decade

2000-20091
1990-19994

Degree Field

Soil Science4
Environmental Sciences1

Degree Level

Master's4
Doctoral1

Degree Name

Master of Science (M.S.)4
Doctor of Philosophy (Ph.D.)1

Language

English [eng]5

License

All rights reserved2

Non-Academic Affiliation

Oregon State University. Graduate School5

Peer Reviewed

No5

Resource Type

Masters Thesis4
Dissertation1

Rights Statement

Copyright Not Evaluated3
In Copyright2

Subject

Soils -- Sulphur content2
Cover crops1
Enzymes1
Nitrogen-fixing plants1
Red clover1
more Subjects »

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