Index Catalog // ScholarsArchive@OSU

Aboveground biomass and ecosystem carbon pools in tropical secondary forests growing in six life zones of Costa Rica

Creator:: Cifuentes Jara, Miguel
Abstract:: Carbon sequestration in tropical secondary forests growing in all climates must be quantified to understand their potential role in adaptation and mitigation strategies of global climate change. Total aboveground biomass (TAGB), soil carbon, and total ecosystem carbon (TEC) were measured in 54 secondary forests growing along a broad bioclimatic gradient...
Resource Type:: Dissertation
Full Text:: aboveground biomass (TAGB), soil carbon, and total ecosystem carbon (TEC) were measured in 54 secondary

An Examination of Factors Controlling the Activity of Ammonia- and Nitrite-oxidizers in Diverse Soils

Creator:: Giguere, Andrew T.
Abstract:: Nitrification is a critical step in the global nitrogen cycle involving the biological oxidation of ammonia (NH₃) to nitrite (NO₂⁻ ) and then to nitrate (NO₃⁻). The first step in nitrification is carried out by NH₃-oxidizing bacteria (AOB) and archaea (AOA), and the second by NO₂⁻-oxidizing bacteria (NOB). In addition...
Resource Type:: Dissertation
Full Text:: content of soil samples was determined. The three field samples of cropped or non-cropped soil from each

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:: ABSTRACT OF THE DISSERTATION OF Marco Keiluweit for the degree of Doctor of Philosophy in Soil Science

Belowground carbon storage and soil organic matter quality following fertilizer and herbicide applications in ponderosa pine plantations along a site-quality gradient in northern California

Creator:: McFarlane, Karis J., 1979-
Abstract:: Belowground carbon (C) storage and quality of soil organic matter (SOM) in forest soils have implications for sustainable forest management and C sequestration, but how these pools change in response to management is poorly understood. I investigated whether fertilization and competing vegetation control, applied alone or in combination early in...
Resource Type:: Dissertation
Full Text:: (Parton et al., 1994). Simulations of soil C dynamics using Century have shown that soil C content

Carbon fluxes across three climatically-distinct forest chronosequences in Oregon

Creator:: Campbell, John
Abstract:: Biometric and gas exchange techniques were used to measure soil respiration (soil surface CO₂ efflux) and NEP (Net Ecosystem Production) across three climatically-distinct forest chronosequences in Oregon. Results indicate significant forest type, age, and forest type x age interaction effects on annual soil respiration. A regional age class distribution skewed...
Resource Type:: Dissertation

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:: Cultivars under Different Levels of Soil Nitrogen and Water Stress. Abstract approved: C. James Peterson

Correlation of phosphorus soil tests and forms of inorganic soil phosphorus with crop response and phosphorus uptake from Aiken soils

Creator:: Vacharotayan, Sorasith
Resource Type:: Dissertation
Full Text:: the Amounts of Different Forms of Soil Phosphorus and Phosphorus Content of Oats and Clover Grown

Cover crops and biochemical functional diversity in relation to nitrogen availability in soil

Creator:: Burket, John Zimmerman
Abstract:: Nitrogen availability in agricultural soils from fertilizer, plant residue inputs, and soil organic matter has important implications beyond crop yield. Legume winter cover crops and one fourth the recommended N rate on sweet corn resulted in yields equivalent to those at the recommended rate in the Willamette Valley of western...
Resource Type:: Dissertation
Full Text:: minus preplant soil nitrate, N mineralization potential (No), mineralization rate constant (k), and

Diagnosis of sulfur deficiency and sulfur fertilization of Trifolium subterraneum L.

Creator:: Kiemnec, Gary L.
Resource Type:: Dissertation
Full Text:: - respond to the C:N:S ratio. If a soil is initially low in SO 4 -S and organic matter low in S content is

Directing ecological succession : the role of competition in restoring semi-arid grasslands dominated by invasive plants

Creator:: Mangla, Seema
Abstract:: Successful ecosystem restoration requires an understanding of the ecological processes directing succession. One of the challenges in the semi-arid grasslands of western United States is replacement of native species by invasive annual grasses. Solutions to this problem require identifying and manipulating ecological processes that direct succession to favor desired vegetation....
Resource Type:: Dissertation
Full Text:: . Soil analysis for nitrate N, ammonium and incubated N revealed only 0.09 µg mineralizable N·g-1 soil

ScholarsArchive@OSU

Aboveground biomass and ecosystem carbon pools in tropical secondary forests growing in six life zones of Costa Rica

An Examination of Factors Controlling the Activity of Ammonia- and Nitrite-oxidizers in Diverse Soils

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

Belowground carbon storage and soil organic matter quality following fertilizer and herbicide applications in ponderosa pine plantations along a site-quality gradient in northern California

Carbon fluxes across three climatically-distinct forest chronosequences in Oregon

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

Correlation of phosphorus soil tests and forms of inorganic soil phosphorus with crop response and phosphorus uptake from Aiken soils

Cover crops and biochemical functional diversity in relation to nitrogen availability in soil

Diagnosis of sulfur deficiency and sulfur fertilization of Trifolium subterraneum L.

Directing ecological succession : the role of competition in restoring semi-arid grasslands dominated by invasive plants

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