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Evaluation Of Bacillus Strains For Plant Growth-Promotion Potentials On Corn (Zea Mays), Wheat (Triticum Aestivum), And Soybean (Glycine Max)., Rufus John Akinrinlola 2018 University of Nebraska - Lincoln

Evaluation Of Bacillus Strains For Plant Growth-Promotion Potentials On Corn (Zea Mays), Wheat (Triticum Aestivum), And Soybean (Glycine Max)., Rufus John Akinrinlola

Theses, Dissertations, and Student Research in Agronomy and Horticulture

Plant growth-promoting rhizobacteria (PGPR) can increase plant growth and yield by facilitating nutrient availability, hormone production, and inhibiting plant deleterious microorganisms. Twelve strains of bacillus (endospore-forming bacteria belonging to the genera Bacillus, Paenibacillus and Lysinibacillus) isolated from wheat rhizospheres were assessed for plant-growth promotion attributes in greenhouse and laboratory experiments. The objectives were to assess each strain’s potential to promote growth in corn, wheat, and soybean; and to determine whether the physiological traits expressed in vitro by the strains related to their effectiveness in promoting plant growth. Greenhouse experiments to assess growth-promotion potential were conducted by applying the strains ...


Modelling The Influence Of Crop Density And Weather Conditions On Field Drying Characteristics Of Switchgrass And Maize Stover Using Random Forest, Amit Khanchi, Stuart J. Birrell, Robert B. Mitchell 2018 Iowa State University

Modelling The Influence Of Crop Density And Weather Conditions On Field Drying Characteristics Of Switchgrass And Maize Stover Using Random Forest, Amit Khanchi, Stuart J. Birrell, Robert B. Mitchell

Agricultural and Biosystems Engineering Publications

Field drying trials were conducted using both field baskets as well as grab sampling techniques to study drying behaviour of switchgrass and maize (corn) stover (CS). Environmental conditions such as hourly solar radiation, vapour pressure deficit (VPD), average wind speed, rainfall amount, harvesting method, and field operations such as swath density were used as variables for model development. A powerful classification-based algorithm, which uses a collection of decision trees called random forest (RF) was utilised to predict moisture content (MC) of switchgrass and CS on wet basis. RF predicted the MC of switchgrass and CS with a coefficient of determination ...


Soil Properties That Influence The Occurrence Of Hydrogen Sulfide Toxicity In Rice Fields, Julia Marie Fryer 2018 University of Arkansas, Fayetteville

Soil Properties That Influence The Occurrence Of Hydrogen Sulfide Toxicity In Rice Fields, Julia Marie Fryer

Theses and Dissertations

Rice (Oryza sativa L.) producers face many challenges throughout each growing season. Hydrogen sulfide (H2S) toxicity is a physiological disorder where sulfate (SO42-) is excessively reduced to the toxic gas, H2S. This can reduce yield and, in severe cases, result in crop death. The main research objectives were to: i) understand chemical and physical characteristics in soils prone to H2S toxicity, ii) determine influential soil characteristics on the incidence of H2S toxicity, iii) determine ammonium sulfate ((NH4)2SO4) fertilizer additions influence on H2S toxicity, and iv) predict when and where H2S will occur. Three greenhouse experiments were conducted using Arkansas ...


Pruning Strategies For High Density ‘Montmorency' Tart Cherry, Sheriden M. Hansen 2018 Utah State University

Pruning Strategies For High Density ‘Montmorency' Tart Cherry, Sheriden M. Hansen

All Graduate Theses and Dissertations

The tart cherry (Prunus cerasus) is the most significant fruit tree crop in Utah, accounting for roughly 51% of the total statewide commercial fruit acreage. In order to accommodate harvesting equipment, tart cherries are grown in conventional orchards with large trees spaced up to 5.5 meters apart. New methods of harvest are adapted to smaller trees in tighter spaced high density (HD) orchards. HD orchards bear fruit earlier in the orchard life than conventional orchards, but likely require different pruning and management strategies, which have not yet been determined for tart cherry. Experimental HD orchards were used to determine ...


Effect Of Silicon On Wheat Growth And Development In Drought And Salinity Stress, Spencer A. Tibbitts 2018 Utah State University

Effect Of Silicon On Wheat Growth And Development In Drought And Salinity Stress, Spencer A. Tibbitts

All Graduate Theses and Dissertations

Silicon is a major component of most soils, and is found in significant concentration in plant tissue. Plants vary widely in the amount of silicon they take up, with some plants excluding it, and others using transporters to move the silicon from the soil into their roots. Early plant physiology studies were unable to determine conclusively whether silicon was essential to plant growth, but for some plants, most notably rice, it has proved to be important enough to justify fertilizing silicon deficient fields.

Researchers at the USU Crop Physiology Lab tested the effect of silicon on wheat growth and seed ...


On The Maintained Significance Of Botanical Illustration In Modern Plant Identification Guides, Andi Kur 2018 University of Tennessee at Chattanooga

On The Maintained Significance Of Botanical Illustration In Modern Plant Identification Guides, Andi Kur

Honors Theses

This project began over 2.5 years ago when I, an artist by hobby, contacted Dr. Joey Shaw, the director of the Herbarium at the University of Tennessee Chattanooga, with a request to sketch from specimens in the UCHT collection. Dr. Shaw, fortuitously in need of an illustrator, prompted me with the opportunity to collaborate with him in the creation of illustrations for the second edition of the Guide to the Vascular Plants of Tennessee. From here, this project has grown as we have attempted to determine the most effective way to illustrate the guide, our questions manifesting in a ...


Dicamba Effects On Soybean (Glycine Max) Growth, Yield, And Offspring, Mark Spencer McCown 2018 University of Arkansas, Fayetteville

Dicamba Effects On Soybean (Glycine Max) Growth, Yield, And Offspring, Mark Spencer Mccown

Theses and Dissertations

Introduction of a new dicamba-resistant (Xtend) trait in soybean and cotton will increase dicamba herbicide use. Consequently, concern for injury to sensitive crops from off-target movement and tank contamination will likely increase. For soybean, foliar symptoms associated with dicamba damage do not necessarily reflect yield losses; hence, experiments were conducted to determine the effects of dicamba on soybean growth, yield, and offspring. Low rates of dicamba [1/64X (8.75 g ae ha-1) and 1/256X (2.18 g ae ha-1) of a normal 1X field rate (560 g ae ha-1)] were applied at two vegetative growth stages (V4, V6 ...


An Evaluation Of Breeding, Agronomic, And Processing Methodologies Of Vegetable Soybean (Edamame) To Increase Domestic Production In The United States Market, David Octor Moseley 2018 University of Arkansas, Fayetteville

An Evaluation Of Breeding, Agronomic, And Processing Methodologies Of Vegetable Soybean (Edamame) To Increase Domestic Production In The United States Market, David Octor Moseley

Theses and Dissertations

Edamame is a food-grade soybean (Glycine max (L.) Merrill) that is either harvested immature (R6 stage) or after plant maturity (R8 stage). At R6, the premium product will have crescent- shaped large green pods and gray pubescence. At R8, the seed will either have stayed green or will have turned yellow, black, or brown. Edamame is a healthy snack with a sweet flavor and firm texture. The edamame market is growing in the United States, creating a need for more adapted varieties. The genetic diversity is low among adapted large-seeded breeding lines. Finding diverse accessions will help develop larger and ...


Using Covers And Wetting Agents To Prevent Winter Injury Of Ultradwarf Bermudagrass, Eric Deboer 2018 University of Arkansas, Fayetteville

Using Covers And Wetting Agents To Prevent Winter Injury Of Ultradwarf Bermudagrass, Eric Deboer

Theses and Dissertations

As ultradwarf bermudagrass (Cynodon dactylon (L.) Pers. × C. transvaalensis Burtt-Davy) putting green use in the United States moves further north, there is risk of sustaining winter injury from low-temperature exposure and tissue desiccation. Protective covers reduce low-temperature exposure on ultradwarf bermudagrass greens. Desiccation of turf can be caused by hydrophobic soils. Wetting agents are applied to actively growing ultradwarf bermudagrass greens to relieve symptoms of hydrophobic soils. Less is known about the effects late-fall wetting agent applications on dormant bermudagrass putting greens. This research aims to define a predicted low-temperature threshold for covering ultradwarf bermudagrass greens and to quantify the ...


A Genome Wide Association Study For Fusarium Head Blight Resistance In Southern Soft Red Winter Wheat, Amanda Holder 2018 University of Arkansas, Fayetteville

A Genome Wide Association Study For Fusarium Head Blight Resistance In Southern Soft Red Winter Wheat, Amanda Holder

Theses and Dissertations

Fusarium head blight (FHB) is a disease of small grains caused by the fungal pathogen Fusarium graminearum. FHB poses potential economic losses and health risks due to the accumulation of the mycotoxin deoxynivalenol (DON) on infected seed heads. The objectives of this study are: 1) evaluate soft red winter wheat (SRWW) lines for resistance to FHB in terms of resistance to initial inoculum (incidence); resistance to spread within the head (severity); resistance to DON accumulation; and resistance to Fusarium damaged kernels (FDK), 2) determine the frequency and effect of known FHB resistance genes and quantitative trait loci (QTL), and 3 ...


Annotated Checklist Of The Vascular Plant Species Observed At The Gordon Natural Area (West Chester University, Pa) 1967-2018 - Version Xiii, Nur Ritter 2018 West Chester University of Pennsylvania

Annotated Checklist Of The Vascular Plant Species Observed At The Gordon Natural Area (West Chester University, Pa) 1967-2018 - Version Xiii, Nur Ritter

Gordon Natural Area Baseline Plant Survey Documents

No abstract provided.


Landscape Foundations: A Practical & Technical Guide To Landscape Maintenance, Marco Crosland 2018 Brigham Young University

Landscape Foundations: A Practical & Technical Guide To Landscape Maintenance, Marco Crosland

Undergraduate Honors Theses

Many homeowners struggle to maintain healthy landscapes. Often, they simply don’t understand basic principles that, if followed, would make a significant difference in the health and appearance of their landscape. The hope of Landscape Foundations is to help homeowners maintain healthy and excellent landscapes by teaching these “correct principles”.

What makes Landscape Foundations different than other landscape guides is that it brings in current research and explains it in a simple way. This guidebook provides pictures and additional resources to explain landscape maintenance principles. It teaches both the practical and technical sides.

Landscape Foundations is written for both beginners ...


Testing The Potential Of Novel Grain Crop Cultivation In Rural Malawi During The Dry Season Through Irrigation And Soil Modification, Jessica Truman 2018 Brigham Young University

Testing The Potential Of Novel Grain Crop Cultivation In Rural Malawi During The Dry Season Through Irrigation And Soil Modification, Jessica Truman

Undergraduate Honors Theses

This research project studied the germination and growth rates of oat and quinoa crops in Mtalimanja, Malawi. This project was part of a larger effort by General Mills and Brigham Young University researchers to increase the diversity and nutrient content of crops in impoverished countries worldwide. It was conducted from May to August 2017 during Malawi’s dry season. Tetraploid oats and quinoa, both modified to increase the protein content of harvested grains, were planted under three different soil conditions: unamended soil, soil mixed with composted chicken litter, and soil with surface-applied granular fertilizer. The research plots were watered daily ...


A Systems Modeling Approach To Forecast Corn Economic Optimum Nitrogen Rate, Laila A. Puntel, John E. Sawyer, Daniel W. Barker, Peter J. Thorburn, Michael J. Castellano, Kenneth J. Moore, Andy VanLoocke, Emily A. Heaton, Sotirios V. Archontoulis 2018 Iowa State University

A Systems Modeling Approach To Forecast Corn Economic Optimum Nitrogen Rate, Laila A. Puntel, John E. Sawyer, Daniel W. Barker, Peter J. Thorburn, Michael J. Castellano, Kenneth J. Moore, Andy Vanloocke, Emily A. Heaton, Sotirios V. Archontoulis

Agronomy Publications

Historically crop models have been used to evaluate crop yield responses to nitrogen (N) rates after harvest when it is too late for the farmers to make in-season adjustments. We hypothesize that the use of a crop model as an in-season forecast tool will improve current N decision-making. To explore this, we used the Agricultural Production Systems sIMulator (APSIM) calibrated with long-term experimental data for central Iowa, USA (16-years in continuous corn and 15-years in soybean-corn rotation) combined with actual weather data up to a specific crop stage and historical weather data thereafter. The objectives were to: (1) evaluate the ...


The Subject Librarian Newsletter, Biology, Fall 2016, Sandy Avila 2018 University of Central Florida

The Subject Librarian Newsletter, Biology, Fall 2016, Sandy Avila

Sandy Avila

No abstract provided.


The Subject Librarian Newsletter, Biology, Spring 2017, Sandy Avila 2018 University of California, Irvine School of Law

The Subject Librarian Newsletter, Biology, Spring 2017, Sandy Avila

Sandy Avila

No abstract provided.


Effect Of Increasing Levels Of Monosilicic Acid On Arsenic And Phorsphorus Sorption In Soil, Flávia Bastos Agostinho 2018 Louisiana State University and Agricultural and Mechanical College

Effect Of Increasing Levels Of Monosilicic Acid On Arsenic And Phorsphorus Sorption In Soil, Flávia Bastos Agostinho

LSU Doctoral Dissertations

Arsenic (As) accumulation in rice (Oryza sativa) grains has increased human’s daily intake. Studies have shown that arsenite is taken up through known silicon (Si) transporters in rice. Moreover, the availability of As in soil is affected by chemically similar ligands that have high affinity to oxides surfaces, such as Si and phosphorus (P). Studies were conducted to: (I) investigate the role of elevated levels of Si on the concentration of different As fractions in soil and on As uptake by rice; (II) evaluate the effect of increasing monosilicic acidconcentrations on As sorption and kinetics in soil; and (III ...


Evaluating Effects Of Gene Mutation And Light Intensity On Arabidopsis Thaliana Development, CarolAnne Bekus 2018 Lynchburg College

Evaluating Effects Of Gene Mutation And Light Intensity On Arabidopsis Thaliana Development, Carolanne Bekus

Student Scholar Showcase

The completion of sequencing Arabidopsis thaliana’s genome has led to the next crucial challenge of determining gene function in these plants. A. thaliana is a model organism often compared to commercial crops. The discovery of gene function within these plants will aid in giving insight on how gene function can affect commercial crop production. Presented here is an analysis comparing wild-type Columbia (Col-O), to single gene mutants when knocking-out transcriptional factors VPI/ABI3-like 1 (val1) and basic region/leucine zipper motif (bZIP). These single gene mutations may affect several traits that in turn can result in morphological changes and ...


Effects Of Elevated Temperature, Elevated Co2 And Photoperiod On Conifer Carbon Fluxes, Joseph R. Stinziano 2018 The University of Western Ontario

Effects Of Elevated Temperature, Elevated Co2 And Photoperiod On Conifer Carbon Fluxes, Joseph R. Stinziano

Electronic Thesis and Dissertation Repository

Increasing temperatures due to rising atmospheric CO2 concentrations will have direct effects on plant physiology, specifically photosynthetic carbon uptake. Changes in photosynthetic carbon uptake will alter feedbacks between vegetation and atmospheric CO2, and changes in forest carbon dynamics will be important in determining whether vegetation amplifies or attenuates the effects of anthropogenic CO2 emissions on climate. Coniferous trees, which are a large component of the boreal forest, are understudied in relation to thermal acclimation of photosynthesis and temperature effects on growth. In the present work, I assess the impact of rising temperatures on carbon fluxes in coniferous ...


Plants, Society, And The Environment, Thomas Harnden, Katie Bridges 2018 Georgia Highlands College

Plants, Society, And The Environment, Thomas Harnden, Katie Bridges

Biological Sciences Grants Collections

This Grants Collection for Plants, Society, and the Environment was created under a Round Six ALG Textbook Transformation Grant.

Affordable Learning Georgia Grants Collections are intended to provide faculty with the frameworks to quickly implement or revise the same materials as a Textbook Transformation Grants team, along with the aims and lessons learned from project teams during the implementation process.

Documents are in .pdf format, with a separate .docx (Word) version available for download. Each collection contains the following materials:

  • Linked Syllabus
  • Initial Proposal
  • Final Report


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