Index Catalog // ScholarsArchive@OSU

Low molecular weight organic acids in forest soils

Creator:: Hayden, John
Abstract:: Two studies concerning low molecular weight organic acids in soils were conducted. In the first study, anion exclusion chromatography was used to separate and identify 12 common organic acids, and the accuracy, precision and detection limits of the method were determined. The method was found to be sensitive and accurate...
Resource Type:: Masters Thesis
Full Text:: Master of Science in Soil Science presented on November 12, 1999. Title: Low Molecular Weight Organic

Refining nitrogen management for organic broccoli production

Creator:: Sullivan, Dan M., Peachey, Ed, and Donaldson, Andrew
Abstract:: Specialty organic fertilizers used in organic vegetable production are expensive. So, from environmental and economic perspectives, growers want to maximize nitrogen (N) fertilizer use efficiency by the crop. This research was conducted to (1) determine sufficient N fertilizer rates for organic broccoli, (2) evaluate the efficacy of a specialty organic...
Resource Type:: Presentation
Full Text:: Nitrogen management for broccoli: organic & conventional

Refining nitrogen management for organic broccoli production

Creator:: Sullivan, Dan M., Peachey, Ed, and Donaldson, Andrew
Abstract:: Specialty organic fertilizers used in organic vegetable production are expensive. So, from environmental and economic perspectives, growers want to maximize nitrogen (N) fertilizer use efficiency by the crop. This research was conducted to (1) determine sufficient N fertilizer rates for organic broccoli, (2) evaluate the efficacy of a specialty organic...
Resource Type:: Conference Proceeding
Full Text:: Andrew Donaldson. 2021. Refining nitrogen management for organic broccoli production. Western Nutrient

Farmer perspectives on the transition to organic agriculture : an Oregon study of farmer motivations and barriers

Creator:: Lloyd, Deanna M.
Abstract:: In the midst of double-digit growth in market demand for organic products, there is a lag in the growth of certified organic production in the United States. This thesis investigated the motivations and barriers farmers face when making the transition to organic agriculture. Three distinct organic farmer typologies were identified:...
Resource Type:: Masters Thesis
Full Text:: . Title: Farmer Perspectives on the Transition to Organic Agriculture: An Oregon Study of Farmer

Soil organic matter regulates molybdenum storage and mobility in forests

Creator:: Marks, Jade A., Perakis, Steven S., King, Elizabeth K., and Pett-Ridge, Julie
Abstract:: The trace element molybdenum (Mo) is essential to a suite of nitrogen (N) cycling processes in ecosystems, but there is limited information on its distribution within soils and relationship to plant and bedrock pools. We examined soil, bedrock, and plant Mo variation across 24 forests spanning wide soil pH gradients...
Resource Type:: Article

Effects of organic and inorganic soil amendments of phosphorus sorption

Creator:: Iyamuremye, Faustin
Resource Type:: Dissertation
Full Text:: Effects of organic and inorganic soil amendments of

Assessing the role of reactive metal species in soil organic matter cycling using chemical imaging

Creator:: Keiluweit, Marco
Abstract:: Intimate associations with reactive metal species permanently protect soil organic matter (SOM) from microbial access and oxidation, contributing to the build-up of organic carbon (C) stocks in soils. It is increasingly recognized, however, that such associations can be reversible and that reactive metal species might even facilitate the oxidation of...
Resource Type:: Dissertation
Full Text:: presented on October 25, 2013 Title: Assessing the Role of Reactive Metal Species in Soil Organic

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:: , 2007. Title: Estimating the Dry Matter Production, Nitrogen Requirements, and Yield of Organic Farm

Effects of ryegrass residue management on Dayton soil organic carbon content, distribution and related properties

Creator:: Chapin, Michele F.
Abstract:: Total organic carbon, total nitrogen, microbial respiration and enzyme activity (β-glucosidase) were measured on several horizons of a Dayton silt loam (fine, montmorillonitic, mesic, Typic Albaqualf) soil cropped to annual ryegrass under two straw residue management systems. The study evaluated the effects of annual burning of straw residues or annual...
Resource Type:: Masters Thesis
Full Text:: organic carbon content, distribution and related properties Michele F. Chapin An Abstract of the Thesis

Soil solarization at an organic farm: effects on weed emergence, soil nutrients and soil microbial communities

Creator:: Trammell, Caleb, Eberhart, Joyce, and Parke, Jennifer L.
Abstract:: Weed management is one of the main challenges for organic agriculture. Soil solarization has been shown to be an effective mitigation strategy for weeds and soil borne plant pathogens but few studies have been conducted in cooler climates such as the Pacific Northwest.
Resource Type:: Poster

ScholarsArchive@OSU

Low molecular weight organic acids in forest soils

Refining nitrogen management for organic broccoli production

Refining nitrogen management for organic broccoli production

Farmer perspectives on the transition to organic agriculture : an Oregon study of farmer motivations and barriers

Soil organic matter regulates molybdenum storage and mobility in forests

Effects of organic and inorganic soil amendments of phosphorus sorption

Assessing the role of reactive metal species in soil organic matter cycling using chemical imaging

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

Effects of ryegrass residue management on Dayton soil organic carbon content, distribution and related properties

Soil solarization at an organic farm: effects on weed emergence, soil nutrients and soil microbial communities

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