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Full-Text Articles in Life Sciences

Influence Of Tall Fescue Baseball Infield Mowing Height On Ground Ball Speed, J. Hoyle, Gage M. Knudson Jul 2017

Influence Of Tall Fescue Baseball Infield Mowing Height On Ground Ball Speed, J. Hoyle, Gage M. Knudson

Kansas Agricultural Experiment Station Research Reports

Athletic field conditions have been shown to influence playability. Results of ball-roll speed studies can be used to predict success of infield hits. Field trials were conducted at Rocky Ford Turfgrass Research Center, Manhattan, KS, to determine the influence of tall fescue baseball infield mowing height on ground ball speed and batter on-base success. Mowing heights of 1, 2, and 3 inches resulted in 1.77, 2.08, and 1.88 s ground ball times, respectively.


Evaluating Zoysiagrass-Tall Fescue Mixtures In Kansas, Mingying Xiang, J. Fry, M. Kennelly Jul 2017

Evaluating Zoysiagrass-Tall Fescue Mixtures In Kansas, Mingying Xiang, J. Fry, M. Kennelly

Kansas Agricultural Experiment Station Research Reports

Water conservation is increasingly important when selecting turfgrasses. Zoysiagrass (Zoysia japonica), a C4 grass, is more drought resistant than C3 grasses. However, there is some resistance to the use of zoysiagrass in lawns and golf courses due to its extended dormant period when turf is brown. The objective of this study was to evaluate mowing height, tall fescue seeding rate and time for establishment of a mixed stand with seeded zoysiagrass. Seeding zoysiagrass and tall fescue together in June generally resulted in a less uniform mixture than seeding zoysiagrass in June and then seeding tall fescue in September. Tall fescue ...


Use Of Pyrimisulfan And Penoxsulam In Turfgrass Systems, J. Hoyle Jul 2017

Use Of Pyrimisulfan And Penoxsulam In Turfgrass Systems, J. Hoyle

Kansas Agricultural Experiment Station Research Reports

Pyrimisulfan + penoxsulam applications in ‘Meyer’ zoysiagrass and buffalograss resulted in excellent large crabgrass control and no turfgrass injury. Applications also do not have any negative influence on tested ornamental species.


Nitrous Oxide Emissions And Carbon Sequestration In Turfgrass: Effects Of Irrigation And Nitrogen Fertilization (Year 2), R. Braun, D. Bremer Jul 2017

Nitrous Oxide Emissions And Carbon Sequestration In Turfgrass: Effects Of Irrigation And Nitrogen Fertilization (Year 2), R. Braun, D. Bremer

Kansas Agricultural Experiment Station Research Reports

This study was conducted from 2013–2016 to determine how irrigation and N fertilization may be managed to reduce N2O emissions and enhance carbon sequestration. In this study, annual nitrous oxide (N2O) emissions were greatest in urea and the least in unfertilized (no N) among treatments. During summer, the lower irrigation treatment resulted in less N2O emitted. All fertilizer and irrigation treatments maintained acceptable quality and high levels of percent green cover; however, the controlled-release fertilizer resulted in more consistent turf quality and green cover compared to urea and unfertilized. Urea fertilizer had higher ...


2013 National Turfgrass Evaluation Program Bermudagrass Test: 2016 Data, L. Parsons, Michael J. Shelton, J. Griffin, J. Hoyle Jul 2017

2013 National Turfgrass Evaluation Program Bermudagrass Test: 2016 Data, L. Parsons, Michael J. Shelton, J. Griffin, J. Hoyle

Kansas Agricultural Experiment Station Research Reports

Kansas represents the northernmost region in the central United States where bermudagrass can be successfully grown as a perennial turfgrass. Historically, few cultivars that have both acceptable quality and adequate cold tolerance have been available to local growers. Because new introductions are continually being selected for improved hardiness and quality, both seeded and vegetative types need regular evaluation to determine their long-range suitability for use in Kansas.


Native Turfgrass Tolerance To Indaziflam Applications, J. Hoyle Jul 2017

Native Turfgrass Tolerance To Indaziflam Applications, J. Hoyle

Kansas Agricultural Experiment Station Research Reports

Multiple research trials were conducted from 2014 to 2016 in the Manhattan, KS, area to determine the use of indaziflam in native turfgrass systems. Results indicated that evaluated species are tolerant to indaziflam applications throughout the year.


Response Of Seven Woody Ornamentals To Turfgrass Herbicide Applications Of Arylex, Penoxsulam, And Pyrimisulfan, J. Hoyle Jul 2017

Response Of Seven Woody Ornamentals To Turfgrass Herbicide Applications Of Arylex, Penoxsulam, And Pyrimisulfan, J. Hoyle

Kansas Agricultural Experiment Station Research Reports

Continued testing of turf-applied herbicides are being conducted to ensure off-target plant injury does not occur in the landscape. Results indicate high herbicide safety on select landscape ornamentals with new herbicides used to manage weeds in turf.


Impact Of Zoysiagrass And Tall Fescue Seed Mixtures On Brown Patch Severity, Mingying Xiang, J. Fry, M. Kennelly Jul 2017

Impact Of Zoysiagrass And Tall Fescue Seed Mixtures On Brown Patch Severity, Mingying Xiang, J. Fry, M. Kennelly

Kansas Agricultural Experiment Station Research Reports

Earlier research has demonstrated that polystands of zoysiagrass and tall fescue can be established successfully, with the potential to provide a high-quality turfgrass stand with reduced inputs. Our objective was to determine whether mixing zoysiagrass with tall fescue will reduce brown patch severity while maintaining overall acceptable quality. Studies were established at the Rocky Ford Turfgrass Research Center in Manhattan, KS. In the split-plot design, natural infection by Rhizoctonia solani or a fungicide-treated control was the whole-plot treatment factor and species (tall fescue monostand and the zoysiagrass/tall fescue mixture) were subplots. During July and August 2016, when hot, humid ...


2012 National Turfgrass Evaluation Program Tall Fescue Test: 2016 Data, L. Parsons, Michael J. Shelton, M. Kennelly, J. Griffin, J. Hoyle Jul 2017

2012 National Turfgrass Evaluation Program Tall Fescue Test: 2016 Data, L. Parsons, Michael J. Shelton, M. Kennelly, J. Griffin, J. Hoyle

Kansas Agricultural Experiment Station Research Reports

Research efforts to improve cultivar quality include selecting for stress tolerance and disease resistance as well as finer leaf texture, a rich green color, and better sward density. Several cultivars included in the 2012 National Turfgrass Evaluation Program Tall Fescue Test performed well and showed good brown patch resistance in south central Kansas during the 2016 growing season.


Development Of Cold Hardy, Large Patch Resistant Zoysiagrass Cultivars For The Transition Zone, Mingying Xiang, J. Fry, M. Kennelly Jul 2017

Development Of Cold Hardy, Large Patch Resistant Zoysiagrass Cultivars For The Transition Zone, Mingying Xiang, J. Fry, M. Kennelly

Kansas Agricultural Experiment Station Research Reports

A Z. japonica genotype TAES 5645 which exhibited resistance to large patch in preliminary studies conducted by our collaborators at Texas A&M University was used as a breeding parent there and crossed with 22 cold hardy zoysiagrasses, resulting in 985 progeny. These progeny were evaluated for cold hardiness and agronomic traits (establishment rate, overall quality, spring greenup, leaf texture, and genetic color) in Manhattan, KS; West Lafayette, IN; and Dallas, TX; from 2012 to 2014. This report focuses on the Manhattan, KS, results. From this work, 60 progeny were identified for further evaluation in larger plots. In fall 2016, ‘Meyer’ (42% of plot area affected) had more large patch than all zoysiagrass progeny (0 to 23%). The top-performing zoysiagrass progeny had little or no large patch present. Among this group of experimental zoysiagrasses, there appear to be promising progeny that have good winter ...


The Effect Of Human Insect Repellents On Perennial Ryegrass (Lolium Perenne) Growth And Recovery, J. Hoyle, Peyton E. South Jul 2017

The Effect Of Human Insect Repellents On Perennial Ryegrass (Lolium Perenne) Growth And Recovery, J. Hoyle, Peyton E. South

Kansas Agricultural Experiment Station Research Reports

Turfgrass damage has been observed from misapplications of human insect repellents. Minimal research has been conducted to determine the cause of the damage. Greenhouse research trials were initiated in November 2016 to survey various human insect repellents on turfgrass growth and recovery. Insect repellents resulted in a wide range of damage. No common trend was observed, although the research trial shows possible repellents to be used around turfgrass that will minimize turfgrass injury.


Effect Of Dormant ‘Midiron’ Bermudagrass Colorant Applications On Clothing Blemishing, J. Hoyle, Daniele L. Mcfadden Jul 2017

Effect Of Dormant ‘Midiron’ Bermudagrass Colorant Applications On Clothing Blemishing, J. Hoyle, Daniele L. Mcfadden

Kansas Agricultural Experiment Station Research Reports

Minimal research exists on potential clothing blemishing when athletes contact turfgrass applied with colorants. Field trials were initiated February 16, 2017, and conducted to test the effect of turfgrass colorant applications on clothing blemishing if an athlete is to come in contact with the playing surface. Turfgrass colorants will adhere to turfgrass leaf blades and do not blemish clothing. However, tested turfgrass pigments did result in significant blemishing of clothing.


Estimating Transpiration From Turfgrass Using Stomatal Conductance Values Derived From Infrared Thermometry, Kenton W. Peterson, D. Bremer, J. M. Blonquist Jr. Jul 2017

Estimating Transpiration From Turfgrass Using Stomatal Conductance Values Derived From Infrared Thermometry, Kenton W. Peterson, D. Bremer, J. M. Blonquist Jr.

Kansas Agricultural Experiment Station Research Reports

Infrared thermometry provides accurate measurements of plant canopy temperature, which, along with basic weather variables, allows estimation of canopy stomatal conductance to water vapor flux (gc) and transpiration. Using this method we compared modeled estimates of transpiration (CONDT) with evapotranspiration (ET) measurements from nearby microlysimeters (LYSET) in tall fescue (Schedonorus arundinaceus Schreb.) turfgrass. Results indicated transpiration may be reliably estimated via calculation of gc in turfgrass.


Measurement Of Evapotranspiration In Turfgrass: Recommended Techniques And Adjustment Coefficients, Kenton W. Peterson, D. Bremer, Kira B. Shonkwiler, J. M. Ham Jul 2017

Measurement Of Evapotranspiration In Turfgrass: Recommended Techniques And Adjustment Coefficients, Kenton W. Peterson, D. Bremer, Kira B. Shonkwiler, J. M. Ham

Kansas Agricultural Experiment Station Research Reports

Evapotranspiration (ET) from turfgrass can be measured directly using lysimeters (LYS), estimated from weather data using models, or approximated using atmometers. Evapotranspiration measurements from LYS were compared with ET estimates from four variations of the American Society of Civil Engineers (ASCE) standardized ET equation including the use of: 1) hourly steps of measured net radiation (Rn) (ASCEHM); 2) hourly steps of Rn calculated from global irradiance (ASCEHC); 3) daily steps of measured Rn (ASCEDM); and 4) daily steps of Rn calculated from global irradiance (ASCEDC); ET from LYS was also compared with ...


Performance And Recovery Of Turfgrasses Subjected To Drought And Traffic Stresses, R. Braun, D. Bremer, J. Hoyle, N. Bloedow Jul 2017

Performance And Recovery Of Turfgrasses Subjected To Drought And Traffic Stresses, R. Braun, D. Bremer, J. Hoyle, N. Bloedow

Kansas Agricultural Experiment Station Research Reports

This study is an effort to determine effects of drought and traffic in turfgrasses. During a 41-day summer drought in 2015 and 2016, warm-season (C4) grasses were more affected by traffic than cool-season (C3) grasses when percent green cover and turf quality were measured. This was because the non-trafficked plots in C4 grasses maintained higher percent green cover and turf quality throughout the drought due to better drought-stress tolerance than the C3 grasses. Regardless of traffic treatment or mowing height, C4 grasses maintained higher percent green cover and visual turf quality than C3 grasses during drought and recovery periods. There ...