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Evaluation Of Creeping Bentgrass Responses To Fertilization With The Branched-Chain Amino Acids, Isaac Mertz Jan 2019

Evaluation Of Creeping Bentgrass Responses To Fertilization With The Branched-Chain Amino Acids, Isaac Mertz

Graduate Theses and Dissertations

Compared to other amino acids, the branched-chain amino acids (BCAA) could be effective additives in foliarly applied fertilization products due to the fact that these molecules are aliphatic, non-polar, and relatively hydrophobic. The BCAA leucine (L), isoleucine (IL), and valine (V) are synthesized in plants and essential to growth for most organisms, however, plant catabolism of BCAA is not completely understood. In humans, BCAA have been reported to increase muscle protein synthesis, and that increase was related to the intake ratio of L to IL and V.

The objective of these studies was to investigate whether BCAA could serve as ...


Evaluation Of The Effects Of Repeated Applications Of Athletic Field Paint To A Sand-Based Rootzone, Ryan Charles May Jan 2019

Evaluation Of The Effects Of Repeated Applications Of Athletic Field Paint To A Sand-Based Rootzone, Ryan Charles May

Creative Components

Athletic field paint is a major part of an athletic field maintenance budget, and can require many hours of work to apply. Sports turf managers often complain about a lack of turfgrass growth and slower drainage in heavily painted portions of their field. Little is known about how repeated athletic field paint applications will change sand-based rootzone characteristics. A study using Kentucky bluegrass and perennial ryegrass grown in flats on a sand-based rootzone was conducted at Iowa State University to determine if repeated athletic field paint applications would change a sand-based rootzone particle size and water infiltration rate. Four different ...


The Horticultural Potential Of Wastewater-Grown Algae Fertilizers, J Austin Gimondo Jan 2018

The Horticultural Potential Of Wastewater-Grown Algae Fertilizers, J Austin Gimondo

Graduate Theses and Dissertations

This thesis comprises five chapters and details the evaluation of wastewater-grown-algae-based materials as plant fertilizers in container-crop production. Chapter one provides context for the thesis followed by a detailed review of literature relevant to bio-based fertilization and the use of algae to treat wastewater. Chapters two through four are manuscripts intended for submission to HortScience. Chapter two details the production of three container-grown crops with pellets or pastes of wastewater-grown algae as a fertilizer source. Evaluation of extruded algae-and-bioplastic materials as fertilizers for three container-crops and for turfgrass are reported in chapters three and four, respectively. The final chapter synthesizes ...


Ntep Perennial Ryegrass Study 2015, Nick Christians, Dan Strey Jan 2016

Ntep Perennial Ryegrass Study 2015, Nick Christians, Dan Strey

Farm Progress Reports

The National Turfgrass Evaluation Program (NTEP) conducts trials throughout the United States on turfgrass adaptation. This trial was established in September 2010 as part of the NTEP program. It contains 88 perennial ryegrass cultivars.


Green Height Bentgrass Cultivar Trial, Nick Christians, Dan Strey Jan 2016

Green Height Bentgrass Cultivar Trial, Nick Christians, Dan Strey

Farm Progress Reports

This is the first year of data from the green height bentgrass trial established in the fall of 2014. The study began the season at 0.5 in.mowing height and was reduced to 3/16-in.during the season. This is a National Turfgrass Evaluation Program (NTEP) trial and is being conducted at several research stations in the United States. It contains 20 seeded cultivars, including a number of the newest experimental cultivars.


Ntep Kentucky Bluegrass Study 2015, Nick Christians, Dan Strey Jan 2016

Ntep Kentucky Bluegrass Study 2015, Nick Christians, Dan Strey

Farm Progress Reports

The National Turfgrass Evaluation Program (NTEP) conducts trials throughout the United States on turfgrass adaptation. This trial was established in September 2011 as a part of the NTEP program. It contains 82 Kentucky bluegrass cultivars.


Ntep Turf-Type Tall Fescue Study 2015, Dan Strey, Nick Christians Jan 2016

Ntep Turf-Type Tall Fescue Study 2015, Dan Strey, Nick Christians

Farm Progress Reports

The National Turfgrass Evaluation Program (NTEP) conducts trials throughout the United States on turfgrass adaptation. This trial was established in September 2012 as a part of the NTEP program. This is the second year data have been collected on this trial. It contains 116 turf type-tall fescue cultivars.


Kalo Fungicide/Adjuvant Trial, Nick Christians, Dan Strey Jan 2016

Kalo Fungicide/Adjuvant Trial, Nick Christians, Dan Strey

Farm Progress Reports

The objective was to compare the control of Dollar Spot caused by the fungi Sclerotinia homeocarpa on creeping bentgrass turf with seven commercial fungicides applied with and without Kalo’s KA-9107 experimental adjuvant.


Evaluation Of Creeping Bentgrass (Agrostis Stolonifera L.) Responses To An Amino Acid Containing Co-Product, Isaac Mertz Jan 2015

Evaluation Of Creeping Bentgrass (Agrostis Stolonifera L.) Responses To An Amino Acid Containing Co-Product, Isaac Mertz

Graduate Theses and Dissertations

Tryptophan, an essential amino acid that acts as a building block in protein synthesis, is a biochemical precursor for serotonin, niacin, and auxin in most organisms. When soil moisture is limited, applying biosolids boosted with auxin from tryptophan may increase root production and endogenous hormone levels that can result in plant growth regulation. Tryptophan is produced industrially, which results in a significant amount of byproducts. Tryptophan byproduct (TRP-B) is considered a waste product, but its amino acid and nutrient content make it a possible growth promoter for turfgrasses. The objective of this research was to determine whether applications of TRP-B ...


Ntep Greens Height Bentgrass Study 2014, Dan Strey, Nick Christians, Ryan Adams Jan 2015

Ntep Greens Height Bentgrass Study 2014, Dan Strey, Nick Christians, Ryan Adams

Iowa State Research Farm Progress Reports

The National Turfgrass Evaluation Program (NTEP) conducts trials throughout the United States on turfgrass adaptation. This trial was initiated in September 2014 as part of the NTEP program. This is the first year data were collected. It contains 20 bentgrass cultivars.


Ntep Kentucky Bluegrass Study 2014, Nick Christians, Dan Strey, Ryan Adams Jan 2015

Ntep Kentucky Bluegrass Study 2014, Nick Christians, Dan Strey, Ryan Adams

Iowa State Research Farm Progress Reports

The National Turfgrass Evaluation Program (NTEP) conducts trials throughout the United States on turfgrass adaptation. This trial was established in September 2011 as a part of the NTEP program. It contains 82 Kentucky bluegrass cultivars.


Ntep Fairway Height Bentgrass Study 2014, Dan Strey, Nick Christians, Ryan Adams Jan 2015

Ntep Fairway Height Bentgrass Study 2014, Dan Strey, Nick Christians, Ryan Adams

Iowa State Research Farm Progress Reports

The National Turfgrass Evaluation Program (NTEP) conducts trials throughout the United States on turfgrass adaptation. This trial was initiated in September 2014 as a part of the NTEP program. This is the first year data were collected. It contains 17 bentgrass cultivars including both creeping and colonial bentgrasses.


Ntep Perennial Ryegrass Study 2014, Nick Christians, Dan Strey, Ryan Adams Jan 2015

Ntep Perennial Ryegrass Study 2014, Nick Christians, Dan Strey, Ryan Adams

Iowa State Research Farm Progress Reports

The National Turfgrass Evaluation Program (NTEP) conducts trials throughout the United States on turfgrass adaptation. This trial was established in September 2010 as part of the NTEP program. It contains 88 perennial ryegrass cultivars.


Ntep Turf Type Tall Fescue Study 2014, Dan Strey, Nick Christians, Ryan Adams Jan 2015

Ntep Turf Type Tall Fescue Study 2014, Dan Strey, Nick Christians, Ryan Adams

Iowa State Research Farm Progress Reports

The National Turfgrass Evaluation Program (NTEP) conducts trials throughout the United States on turfgrass adaptation. This trial was established in September 2012 as a part of the NTEP program. This is the second year data have been collected on this trial. It contains 116 turf type tall fescue cultivars.


Phytotoxicity Test Of Amino Acid Complex On T-1 Creeping Bentgrass, Daniel J. Strey, Nick E. Christians Jan 2014

Phytotoxicity Test Of Amino Acid Complex On T-1 Creeping Bentgrass, Daniel J. Strey, Nick E. Christians

Iowa State Research Farm Progress Reports

The objective was to determine if the given products (Table 1) are phytotoxic to turfgrass.


Kentucky Bluegrass Cultivar Study, Nick E. Christians, Daniel J. Strey Jan 2014

Kentucky Bluegrass Cultivar Study, Nick E. Christians, Daniel J. Strey

Iowa State Research Farm Progress Reports

The National Turfgrass Evaluation Program (NTEP) conducts trials throughout the United States on turfgrass adaptation. This trial was established in September 2011 as a part of the NTEP program. It contains 82 Kentucky bluegrass cultivars.


Perennial Ryegrass Cultivar Study, Nick E. Christians, Daniel J. Strey, Evan J. Alderman Jan 2014

Perennial Ryegrass Cultivar Study, Nick E. Christians, Daniel J. Strey, Evan J. Alderman

Iowa State Research Farm Progress Reports

The National Turfgrass Evaluation Program (NTEP) conducts trials throughout the United States on turfgrass adaptation. This trial was established in September 2010 as a part of the NTEP program. It contains 88 perennial ryegrass cultivars.


Turf-Type Tall Fescue Cultivar Study, Daniel J. Strey, Nick E. Christians Jan 2014

Turf-Type Tall Fescue Cultivar Study, Daniel J. Strey, Nick E. Christians

Iowa State Research Farm Progress Reports

The National Turfgrass Evaluation Program (NTEP) conducts trials throughout the United States on turfgrass adaptation. This trial was established in September 2012 as a part of the NTEP program. Data will be collected over the next five years. This was the first year data was collected on this trial. It contained 16 turf-type tall fescue cultivars.


Comparison Of Polymer-Coated Urea Fertilizers, Daniel J. Strey, Nick E. Christians Jan 2014

Comparison Of Polymer-Coated Urea Fertilizers, Daniel J. Strey, Nick E. Christians

Iowa State Research Farm Progress Reports

The objective was to compare the nitrogen release rate and turf response to Polyon 44.5- 0-0 and XCU 43-0-0 on Kentucky bluegrass turf maintained at lawn height.


Evaluation Of Solitare For Postemergence Crabgrass Control, Nick E. Christians, Daniel J. Strey Jan 2013

Evaluation Of Solitare For Postemergence Crabgrass Control, Nick E. Christians, Daniel J. Strey

Iowa State Research Farm Progress Reports

The objective of this study was to evaluate postemergence crabgrass controls in Kentucky bluegrass turf.


Converting A Research Green To A Bentgrass Fairway, Daniel J. Strey, Marcus A. Jones, Nick E. Christians Jan 2013

Converting A Research Green To A Bentgrass Fairway, Daniel J. Strey, Marcus A. Jones, Nick E. Christians

Iowa State Research Farm Progress Reports

The project was initiated to convert an existing research putting green to a 007 creeping bentgrass (Agrostis stolonifera) fairway. The previous green was attached to an adjacent fairway, which made it difficult to perform routine maintenance practices. With the addition of the A-4 creeping bentgrass green in the fall of 2011, the square footage of greens height bentgrass would not be affected by the conversion.


Kentucky Bluegrass Cultivar Study, Zachary A. Simons, Nick E. Christians, Daniel J. Strey Jan 2013

Kentucky Bluegrass Cultivar Study, Zachary A. Simons, Nick E. Christians, Daniel J. Strey

Iowa State Research Farm Progress Reports

The National Turfgrass Evaluation Program (NTEP) conducts trials throughout the United States on turfgrass adaptation. This trial was established in September 2011 as a part of the NTEP program. It contains 82 Kentucky bluegrasss cultivars.


Perennial Ryegrass Cultivar Study, Zachary A. Simons, Nick E. Christians, Daniel J. Strey Jan 2013

Perennial Ryegrass Cultivar Study, Zachary A. Simons, Nick E. Christians, Daniel J. Strey

Iowa State Research Farm Progress Reports

The National Turfgrass Evaluation Program (NTEP) conducts trials throughout the United States on turfgrass adaptation. This trial was established in September 2010 as a part of the NTEP program. It contains 88 perennial ryegrass cultivars.


Tee Complex Construction Project, Daniel J. Strey Jan 2013

Tee Complex Construction Project, Daniel J. Strey

Iowa State Research Farm Progress Reports

The project was initiated to construct an area that would simulate a golf course tee and green complex. Over fifteen years ago, a south-facing,sloped green was built to USGA specifications that allowed for research under these specific conditions. The trial had been terminated and left fallow for several years.


Evaluation Of Fungicide Efficacy On Creeping Bentgrass, Mark L. Gleason, Steven Johnson, Jean C. Batzer Jan 2012

Evaluation Of Fungicide Efficacy On Creeping Bentgrass, Mark L. Gleason, Steven Johnson, Jean C. Batzer

Iowa State Research Farm Progress Reports

Ten fungicide treatments were evaluated during 2011 for control of dollar spot and brown spot in green height creeping bentgrass at two locations: the ISU Horticulture Research Station, Ames, Iowa, and a practice green at ISU’s Veenker Golf Course in Ames.


Creeping Bentgrass Dollar Spot Study, Nick E. Christians, Marcus Jones Jan 2012

Creeping Bentgrass Dollar Spot Study, Nick E. Christians, Marcus Jones

Iowa State Research Farm Progress Reports

Creeping bentgrass forms a dense, uniform playing surface ideal for sport and is commonly utilized on golf course putting greens and fairways. Despite its widespread use, creeping bentgrass is susceptible to many turfgrass diseases including dollar spot (Sclerotinia homeocarpa). Recently developed cultivars of creeping bentgrass are available that have increased disease resistance and would be desirable to turf managers who manage creeping bentgrass turf with limited fungicide applications.

The objectives of this study were to determine the susceptibility of creeping bentgrass (Agrostis stolonifera) cultivars to dollar spot under both green height and fairway height.


Evaluation Of An Amino Acid Biostimulant To Hasten Turfgrass Recovery, Marcus Jones, Nick E. Christians Jan 2012

Evaluation Of An Amino Acid Biostimulant To Hasten Turfgrass Recovery, Marcus Jones, Nick E. Christians

Iowa State Research Farm Progress Reports

Turf managers strive to maintain dense, uniform stands of turf. Damage caused by winter desiccation, diseases, insects, traffic, or other stresses can compromise turf cover. Recovery of the turf stand is essential in maintaining proper ball roll, playability, and weed control for golf course superintendents. Timely recovery from damage from advantageous and anecdotal evidence suggests GreenNcrease, an Ajinomoto USA, Inc. biostimulant product, may aid in the recovery of damaged turf. Previous research has also demonstrated the product’s ability to stimulate certain growth characteristics of creeping bentgrass.

A research trial was conducted to evaluate GreenNcrease’s impact on the recuperative ...


Perennial Ryegrass Study, Nick E. Christians, Marcus Jones Jan 2012

Perennial Ryegrass Study, Nick E. Christians, Marcus Jones

Iowa State Research Farm Progress Reports

The National Turfgrass Evaluation Program (NTEP) conducts trials throughout the United States on turfgrass adaptation. This trial was established in September 2010 as a part of the NTEP program. It contains 88 perennial ryegrass cultivars.


Seedbanking Potential Of Kentucky Bluegrass And Perennial Ryegrass, Andrew H. Hoiberg, David D. Minner Jan 2012

Seedbanking Potential Of Kentucky Bluegrass And Perennial Ryegrass, Andrew H. Hoiberg, David D. Minner

Iowa State Research Farm Progress Reports

The ability of the cool season turfgrasses, Kentucky bluegrass (Poa pratensis L.), and perennial ryegrass (Lolium perenne L.) to form a seedbank under intense traffic scenarios is not well understood. The practice of establishing a seedbank on athletic fields has often been recommended in popular venues, but has received little attention in academic research. Likewise, anecdotal reporting of seed unexpectedly germinating long after planting are common but have not been scientifically tested.


Residual Crabgrass Control And Broadleaf Weed Efficacy With Imprelis Herbicide, Marcus Jones, Nick E. Christians Jan 2012

Residual Crabgrass Control And Broadleaf Weed Efficacy With Imprelis Herbicide, Marcus Jones, Nick E. Christians

Iowa State Research Farm Progress Reports

Imprelis (aminocyclopyrachlor) was released by DuPont Professional Products into the turf market in spring 2011 as a broadleaf herbicide. It is part of a new chemical subclass called pyrimidine carboxylic acids. Work conducted at Iowa State the past couple of years show Imprelis to be very effective against a broad spectrum of broadleaf weeds. Its advantage is that it is effective against several hard to control weeds such as ground ivy, violets, and henbit. It also has the advantages of being applied at very low rates of active ingredient and is rainfast, meaning that it does not need to remain ...