Index Catalog // ScholarsArchive@OSU

Annual Forages Differ in Response to Partial-Season Irrigation Deficit in Both Spring Seeded and Summer Seeded Cropping Systems

Creator:: Fan, Qianqian
Abstract:: Water scarcity during summer becomes a serious problem in the Pacific Northwest, threatening forage production provided to livestock. Annual forages show great potential in handling drought because of their flexibility in seeding date and short growing season, and can shift the production to periods of feed shortage and fill the...
Resource Type:: Masters Thesis
Full Text:: Seeded and Summer Seeded Cropping Systems. Abstract approved

Lithologic Controls on Soil Carbon Partitioning in the Alaskan Coastal Temperate Rainforest

Creator:: Fleiner, Julia H.
Abstract:: Coastal Temperate Rainforests of western North America are carbon dense ecological regions of great importance due to their high biological productivity and climatic conditions leading to the natural accumulation of soil organic carbon (SOC). Yet, the distribution of SOC remains understudied in the CTR environments, particularly in upland mineral soils,...
Resource Type:: Masters Thesis
Full Text:: to collect my samples in the summer of 2020. Without the help of David D’Amore, Diogo Spinola, and

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

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

Elucidating Key Aspects of the Biology of Select Species of Snail-killing Flies (Diptera: Sciomyzidae) in Oregon

Creator:: Alzahrani, Fares
Abstract:: Members of the family Sciomyzidae, known as snail-killing or marsh flies, are unique amongst insects in that the vast majority of reared species feed exclusively on mollusks and as a result their biological control potential has been well documented in the scientific literature. However, in North America there is a...
Resource Type:: Masters Thesis
Full Text:: released during warm summer days compared to cooler days during the fall. The flight mill data

Vernalization requirement studies with Pacific Northwest wheats

Creator:: Baloch, Dost M.
Abstract:: Vernalization plays a fundamental role in the adaptation of winter cereals to their growing environment by controlling their growth habit, thereby allowing them to escape cold injury. Because of the climatic conditions of the region, dry summers and wet winters, growers sometimes cannot plant all of their winter wheat in...
Resource Type:: Masters Thesis
Full Text:: them to escape cold injury. Because of the climatic conditions of the region, dry summers and wet

Olives in Oregon: Grower Survey, On-Farm Propagation, and Orchard Establishment in a Non-Traditional Growing Region

Creator:: Barker, Tessa A.
Abstract:: Olive production potential in Oregon was researched in a multi-disciplinary approach, including a grower survey, a propagation greenhouse study, and a field study, from 2018 through 2020. The Oregon Olive Grower Survey was designed to collect information relating to orchard establishment and management practices, knowledge and understanding of these practices,...
Resource Type:: Masters Thesis
Full Text:: , with lower root numbers, lengths, and percentages in summer. 1:1 peat:perlite media was found to be

Long-term effects of tillage, nitrogen, and rainfall on winter wheat yields

Creator:: Camara, Kelli Marie
Abstract:: Winter wheat is commonly grown in dryland cropping systems in the Pacific Northwest region of semi-arid eastern Oregon. For agronomic, economic, and environmental reasons, it is important to understand the long-term sustainability of such dryland systems. The objective of this study was to evaluate the long-term effects of tillage, nitrogen...
Resource Type:: Masters Thesis
Full Text:: research experiments in the western United States. The experiment consisted of a winter wheat-summer

Estimating the dry matter production, nitrogen requirements, and yield of organic farm-grown potatoes

Creator:: McQueen, John Paul Gainer
Abstract:: As part of a participatory research project, where farmers and Oregon State University researchers collaborated, aspects of potato (Solanum tuberosum L.) growing systems were studied. It was determined through conversations with the farmers that quantification of certain growth parameters of potato was lacking, including dry matter accumulation, crop nitrogen (N)...
Resource Type:: Masters Thesis
Full Text:: collected in spring, summer, and post-harvest from the participating farms’ potato fields in 2006. The

ScholarsArchive@OSU

Annual Forages Differ in Response to Partial-Season Irrigation Deficit in Both Spring Seeded and Summer Seeded Cropping Systems

Lithologic Controls on Soil Carbon Partitioning in the Alaskan Coastal Temperate Rainforest

Impact of a red clover winter cover crop on carbon and nitrogen mineralization by microorganisms in soil aggregates

Nitrate and water under terraced dryland wheat production in Oregon

Winter cover cropping effects on integrative biological indicators of soil quality

Elucidating Key Aspects of the Biology of Select Species of Snail-killing Flies (Diptera: Sciomyzidae) in Oregon

Vernalization requirement studies with Pacific Northwest wheats

Olives in Oregon: Grower Survey, On-Farm Propagation, and Orchard Establishment in a Non-Traditional Growing Region

Long-term effects of tillage, nitrogen, and rainfall on winter wheat yields

Estimating the dry matter production, nitrogen requirements, and yield of organic farm-grown potatoes

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