Index Catalog // ScholarsArchive@OSU

Nitrogen uptake and utilization by Pacific Northwest crops

Creator:: Oregon State University. Extension Service, Washington State University. Extension, University of Idaho. Extension, Sullivan, Dan M. (Dan Matthew), 1954-, Hart, John M. (John Mervyn), 1947-, Christensen, Neil Walter, 1944-, and Pacific Northwest Cooperative Extension
Abstract:: This publication provides information on the timing and pattern of biomass accumulation and nitrogen (N) uptake for a variety of Pacific Northwest crops. You can use this information to schedule N fertilizer applications for maximum efficiency. To achieve near-maximum crop yields, an adequate supply of available N must be present...
Resource Type:: Technical Report
Full Text:: Nitrogen Uptake and Utilization by Pacific Northwest Crops n PNW

Modeling nitrogen fixation in dead wood

Creator:: Hicks, William Thomas
Abstract:: A mechanistic simulation model of nitrogen fixation in dead wood was developed to help synthesize knowledge, develop hypotheses, and estimate rates of nitrogen fixation in the Pacific Northwest. In this model nitrogen fixation is directly controlled by log substrate, temperature, moisture, and oxygen content. Respiration and diffusion of oxygen indirectly...
Resource Type:: Dissertation

Utilization of inorganic and organic nitrogen by phytoplankton off the Washington and Oregon coasts

Creator:: Kokkinakis, Steven Andon
Resource Type:: Masters Thesis
Full Text:: and Organic Nitrogen by Phytoplankton off the Washington and Oregon Coasts Abstract approved

Nitrogen mineralization from organic amendments during the second year following application

Creator:: Kusonwiriyawong, Charirat
Abstract:: Estimates of nitrogen (N) available from long-term application of organic amendments are required to balance N inputs with crop N requirements. Two studies were conducted to (1) determine N mineralized from organic amendments (manures and composts) during year 2 after application, and (2) compare plant-available N (PAN) determined via in...
Resource Type:: Masters Thesis
Full Text:: degree of Master of Science in Soil Science presented on March 23. 2005. Title: Nitrogen Mineralization

Phosphorus control of nitrogen fixation

Creator:: Watkins-Brandt, Katie S.
Abstract:: Under conditions of fixed N-limitation, as with most oligotrophic systems, the process of biological N₂ fixation (diazotrophy) is favored, provided the necessary trace elements and vitamins are sufficient. Despite the well understood contributions of N₂ fixation in oligotrophic regions, the nutritional and ecological controls of marine diazotrophs have not been...
Resource Type:: Masters Thesis
Full Text:: ........................................................................................ 6 2 Enhancement of nitrogen and carbon fixation in the oligotrophic North Pacific via inorganic

Influences of nitrogen on carbon dynamics in forest soil and density fractions

Creator:: Swanston, Christopher W.
Abstract:: Application of N fertilizer is a common forest management practice in the Pacific Northwest, yet the long-term influence of fertilization on forest soil properties is not well known. Although elevated N often increases mineralization of C and N from labile organic matter, negative effects have been documented in recalcitrant organic...
Resource Type:: Dissertation

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:: , D.M., J.M. Hart, and N.W. Christensen. 1999a. Nitrogen uptake and utilization by pacific northwest

Functional profiles of soil microbial communities in second-growth Douglas-fir forests of the Pacific Northwest

Creator:: McGinnis, Megan L.
Abstract:: Forests are one of the largest repositories of terrestrial C. Understanding factors that drive organic matter transformations and nutrient efflux from these systems is therefore highly important. Temperate forests are of particular significance due to the large fraction of C that is stored below ground in the soil. Characterizing nutrient...
Resource Type:: Masters Thesis
Full Text:: -growth Douglas- fir Forests of the Pacific Northwest Abstract Approved: David D. Myrold

Changes in grain quality and grain protein composition of winter wheat cultivars under different levels of soil nitrogen and water stress

Creator:: Saint Pierre, Carolina
Abstract:: Hard white winter (HVVW) wheat cultivars must have superior protein quality and consistent processing quality to be successful in the Asian market. New cultivars and management strategies are needed to produce HVVW grain for both bread and noodle applications from diverse environments in the US Pacific Northwest (PNW). This study...
Resource Type:: Dissertation
Full Text:: Pacific Northwest (PNW), characterized by late season drought stress, could have an advantage in hard

Soil respiration, carbon and nitrogen leaching, and nitrogen availability in response to harvest intensity and competing vegetation control in Douglas-fir (Pseudotsuga menziesii) forests of the Pacific Northwest

Creator:: Slesak, Robert A.
Abstract:: Management practices following forest harvest can affect long-term soil productivity through alteration of soil carbon (C) and nitrogen (N) pools, but processes contributing to change are poorly understood. I assessed effects of three levels of logging-debris retention in combination with initial or annual applications of competing vegetation control (CVC) following...
Resource Type:: Dissertation
Full Text:: Douglas-fir (Pseudotsuga menziesii) forests of the Pacific Northwest Abstract approved

ScholarsArchive@OSU

Nitrogen uptake and utilization by Pacific Northwest crops

Modeling nitrogen fixation in dead wood

Utilization of inorganic and organic nitrogen by phytoplankton off the Washington and Oregon coasts

Nitrogen mineralization from organic amendments during the second year following application

Phosphorus control of nitrogen fixation

Influences of nitrogen on carbon dynamics in forest soil and density fractions

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

Functional profiles of soil microbial communities in second-growth Douglas-fir forests of the Pacific Northwest

Changes in grain quality and grain protein composition of winter wheat cultivars under different levels of soil nitrogen and water stress

Soil respiration, carbon and nitrogen leaching, and nitrogen availability in response to harvest intensity and competing vegetation control in Douglas-fir (Pseudotsuga menziesii) forests of the Pacific Northwest

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