Index Catalog // ScholarsArchive@OSU

Monitoring soil nitrate to estimate cover crop nitrogen contribution in organic vegetable production fields

Creator:: Andrews, Nicholas, Sullivan, Dan M., and Pool, Kristin
Abstract:: Organic vegetable growers rely on legume cover crops as an economical source of plant-available N. This research evaluated N contributions to summer vegetable crops by cover crops (CC) residues by monitoring soil nitrate (NO3-N) concentrations during the summer crop growing season. Replicated field plots were established with three CC mixes:...
Resource Type:: Conference Proceeding
Full Text:: organic vegetable production fields. p. 97-102. In: Proc Western Nutrient Management Conference. Reno

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

An Analysis of Nutrient Depletion in Douglas-fir Forests of the Oregon Coast Range

Creator:: Siah, Kaveh G.
Abstract:: Nutrient limitation constrains tree growth in many managed forests. Nitrogen (N) is the most common limiting nutrient, but high N supply can shift limitation to other nutrients, particularly phosphorus (P) and the base cations calcium (Ca), magnesium (Mg), and potassium (K). As different soil minerals have different capacities to supply...
Resource Type:: Masters Thesis
Full Text:: poorly understood cause of nutrient loss from PNW soils. Management practices that can influence soil

Soil Health and the Response of the Soil Microbial Community to Disturbances across Western North America

Creator:: Kersey, Jordan H.
Abstract:: Temperate coniferous forests, such as those that cover vast areas of the western US and Canada, have evolved to depend on cycles of disturbance for succession of species and overall ecosystem maintenance. Many of these forest systems are managed, often for timber production, where disturbances are of anthropogenic origin and...
Resource Type:: Masters Thesis
Full Text:: management treatments on either nutrient pool status or microbial activity indicators. One exception being

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:: Donaldson Crop & Soil Science; Horticulture Dan.Sullivan@oregonstate.edu Western Nutrient Mgmt. Conf

Impacts of Reduced Tillage and Disturbance on Soil Health and Microbial Community Dynamics in Grass Seed Cropping Systems

Creator:: Zamora, Cesar G.
Abstract:: In Oregon perennial and annual grass seed cropping systems conservation management practices and their impacts on soil health and soil microbial community is not well understood. There is strong motivation to employ conservation tillage and other conservation practices to curb atmospheric carbon levels and improve soil health. However, the few...
Resource Type:: Masters Thesis
Full Text:: Trippe In Oregon perennial and annual grass seed cropping systems conservation management

Monitoring soil nitrate to estimate cover crop nitrogen contribution

Creator:: Andrews, Nicholas, Sullivan, Dan M., and Pool, Kristin
Abstract:: Organic vegetable growers rely on legume cover crops as an economical source of plant-available N. This research evaluated N contributions to summer vegetable crops by cover crops (CC) residues by monitoring soil nitrate (NO3-N) concentrations during the summer crop growing season. Replicated field plots were established with three CC mixes:...
Resource Type:: Presentation
Full Text:: Nutrient Mgmt. Conference March, 2023 Objectives 1. Monitor in-season soil nitrate-N contributions from

Impact of Dairy Manure Digestate on Microbial Activities in Soil

Creator:: Waggoner, Ashley L
Abstract:: Amendments and fertilizers applied to optimize crop production and improve soil health also supply inputs of soil organic matter (SOM) and nutrients that affect soil microorganisms. In the dairy-intensive Pacific Northwest, dairy manure is stored as slurry mixtures until conditions are appropriate for soil application. During storage, the manure begins...
Resource Type:: Dissertation
Full Text:: , soils were collected in western Oregon from different management practices: (i) pasture receiving long

Applications in plant breeding : end-use quality, tissue culture propagation systems, and outreach for K-12 education

Creator:: Halstead, Margaret A.
Abstract:: This thesis consists of five chapters: a general introduction, two manuscripts, a collection of published lesson plans, and a general conclusion. The works collected herein are united by the common theme of practical applications in plant breeding. The first manuscript reports a study performed on five malting barley lines grown...
Resource Type:: Masters Thesis
Full Text:: different growing media (all combinations of two nutrient media, MS and DKW, and two carbon sources

Dilute Permanganate Preferentially Oxidizes Polyphenols Rather than Microbial Food: A Reinterpretation of a Common “Active Carbon” Measurement

Creator:: Christy, Isabel
Abstract:: “Active carbon” is a rapidly cycling soil organic carbon (SOC) fraction that acts as an energy and nutrient source for the microbial community. Dilute permanganate oxidation has been used to measure an “active carbon” fraction with the assumption that permanganate oxidation mimics enzymatic decomposition. Permanganate oxidizable carbon (PoxC) has become...
Resource Type:: Masters Thesis
Full Text:: that acts as an energy and nutrient source for the microbial community. Dilute permanganate

ScholarsArchive@OSU

Monitoring soil nitrate to estimate cover crop nitrogen contribution in organic vegetable production fields

Refining nitrogen management for organic broccoli production

An Analysis of Nutrient Depletion in Douglas-fir Forests of the Oregon Coast Range

Soil Health and the Response of the Soil Microbial Community to Disturbances across Western North America

Refining nitrogen management for organic broccoli production

Impacts of Reduced Tillage and Disturbance on Soil Health and Microbial Community Dynamics in Grass Seed Cropping Systems

Monitoring soil nitrate to estimate cover crop nitrogen contribution

Impact of Dairy Manure Digestate on Microbial Activities in Soil

Applications in plant breeding : end-use quality, tissue culture propagation systems, and outreach for K-12 education

Dilute Permanganate Preferentially Oxidizes Polyphenols Rather than Microbial Food: A Reinterpretation of a Common “Active Carbon” Measurement

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