Browsing OSU Dissertations by Author "Zhang, Hailin"
Now showing items 1-20 of 29
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Bioavailability and toxicity of heavy metals in contaminated soils to human and ecological receptors
Schroder, Jackie (2003-05) -
Changes in response indices as a function of time in winter wheat (Triticum aestivum L.) and use of optical sensors for detecting yield differences at different resolutions in corn (Zea mays L.)
Chung, Byungkyun (2007-05)Scope and Method of Study: For chapter one, a study on hard red winter wheat was conducted to determine the nitrogen (N) responsiveness using a response index (RI) as a function of time at 5-locations over a 3-year period. ... -
Characterization of isolates of Sclerotium rolfsii and evaluation of peanut for reaction to southern blight
Saude, Catarina C. N. (2003-08) -
Effect of preplant/early irrigation, nitrogen and seeding rate on winter wheat grain yield
Dhital, Sulochana (2016-12)Preplant or early irrigation in winter wheat (Triticum aestivum L.) can improve plant stands and lead to higher grain yields. Optimum seeding density more efficiently utilizes resources and optimizes yield. In lieu of ... -
Effect of Row Spacing, Plant Density, Nitrogen Rate, and Planting Method on Maize (zea Mays L) Grain Yield
Fornah, Alimamy (2018-12-01)Narrow row spacing often results in increased plant density and reduced variability. This study was conducted to determine how narrow row spacing and increased plant density influence corn yield, harvest count, cob weight, ... -
Effects of nutrient sources, harvest frequency, and environmental conditions on switchgrass production and soil properties
Edano, Ma. Lourdes S. (2013-12)Switchgrass is considered a promising low-input biofuel feedstock. Previous development primarily focused on aboveground production, however, feedstock success will depend on identifying sustainable management practices ... -
Enhanced Alcohol Production During Syngas Fermentation Using Biochar
Sun, Xiao (2018-07-01)Microbial fermentation of syngas (mainly CO, H2 and CO2) into biofuels (ethanol, butanol, etc.) and chemicals (carboxylic acids, 2,3-butanediol, etc.) is a flexible and promising route for producing liquid biofuels and ... -
Enhanced alcohol production during syngas fermentation using biochar
Sun, Xiao (2018-07)Microbial fermentation of syngas (mainly CO, H2 and CO2) into biofuels (ethanol, butanol, etc.) and chemicals (carboxylic acids, 2,3-butanediol, etc.) is a flexible and promising route for producing liquid biofuels and ... -
Evaluating methods for improving nitrogen use efficiency in corn and hard red winter wheat
Teal, Roger Keith (2005-05)Scope and Method of Study: For chapter one, Corn (Zea mays L.) experiments were conducted to evaluate spectral reflectance, measuring the normalized difference vegetation index (NDVI) with a GreenSeeker Hand Held optical ... -
Evaluation of phosphorus use efficiency in winter wheat varieties and using optical sensors to predict the maize population (Zea mays L.)
Alharbi, Saif Fuhaid (2018-05)This dissertation includes two topics; 1) evaluation of P use efficiency in winter wheat varieties. 2) using optical sensors to predict the maize population. The objective of the first topic was to (i) simulate a soil with ... -
Extractability and bioavailability of arsenic in soils and the effect of iron remediation efforts
Armstrong, Felicia Pappas (2003-05) -
I. Evaluation of seed treatments and nitrogen on soybean nodulation and grain yield.
Eickhoff, Elizabeth Mary (2021-05)Soybeans (Glycine max) are known to form symbiotic relationships with soil microbes and conduct biological nitrogen fixation (BNF). However, only 50-60% of the crop's nitrogen (N) requirement is met through this process. ... -
I. Optimum sulfur application for soybean (Glycine max) in Oklahoma
Wehmeyer , Gwendolyn Bess (2020-05)Soybean (Glycine max) are a vital legume crop present in the United States with substantial nutritional value and oil content. In 2017, 36,421,707 ha of soybean were harvested in the US (USDA, 2017). As soybean markets ... -
Improving nitrogen use efficiency, soil properties and grain yield of maize (Zea mays L.) and winter wheat (Triticum aestivum L.) with biochar and no-tillage practice
Omara, Peter (2020-12)The first study (chapter 1) of this dissertation was conducted to establish possible synergies in applying inorganic fertilizer nitrogen (N) in combination with biochar (NBC) and the subsequent role in optimizing maize ... -
Investigating scale, rainfall-runoff sequences and BMP effects on phosphorus, runoff and sediment yield
Gebirrye, Tesfaye Demissie (2004-12)Scope and Methods of Study: 1) Scale effects on phosphorus (P) loss and runoff depth from pastures were investigated by summarizing water quality data from 19 research projects. Spatial (area) and temporal (days after ... -
Management of improved pastures in Oklahoma
Santillano-Cazares, Jesus (2007-07)Scope and Method of Study: This study consisted of four different research projects aiming to solve specific problems in pastures management. I. The objective was to determine the feasibility of using tall fescue as a multi ... -
Microbial community and enzyme activities in prairie soil ecosystems under different management
Katsalirou, Eirini (2006-12)Scope and Method of Study: The aim of this study was to evaluate the effects of longterm management practices on microbial properties and biochemical processes related to C, N, and P cycling of semiarid prairie soil ...