Universiẗat, Diss., 2001--Heidelberg. / Erscheinungsjahr an der Haupttitelstelle: 2001.

Techn. Hochsch., Diss., 2002--Aachen.

University, Diss., 2005--Bremen.

Memoria para optar al título profesional de Ingeniero Agrónomo Mención Fitotecnia / Uno de los problemas más importantes de manejo dentro de un green de golf, es el manejo del fieltro, que se presenta como una capa entre la parte verde de la planta y la superficie del suelo. La presencia del fieltro le da al green características poco deseables a la hora de jugar, también le confiere una mayor susceptibilidad a plagas y enfermedades, baja conductividad hidráulica, mayor susceptibilidad a estrés por frío o calor, etc. Como la capa de fieltro está mayoritariamente compuesta por tejido en descomposición, se planteó la hipótesis que al aplicar Trichoderma harzianum esta capa disminuiría su grosor ya que este hongo es capaz de descomponer la materia orgánica presente en el fieltro. El estudio se realizó en un vivero de pasto de green en el Prince of Wales Country Club, en la Comuna de La Reina desde Noviembre del 2009 a Enero del 2010, utilizando un diseño experimental de bloques completos al azar con cinco repeticiones. El objetivo es evaluar diferentes dosis de aplicación de Trichoderma harzianum en la descomposición de la materia orgánica y la reducción de la capa de fieltro, por lo que se probaron dos dosis del producto comercial HARZTOP más un testigo y se realizaron tres mediciones: altura de capa de fieltro, contenido de materia orgánica en el fieltro y una medición de consolidación. Los resultados arrojaron una disminución de un 40% en la altura del fieltro con el uso del producto comercial, llegando a una altura mínima promedio de 11 mm. La materia orgánica, contrario a lo planteado en la hipótesis, presentó un significativo incremento, se cree que la causa de esto es un aumento en el desarrollo de las raíces estimulado por la presencia del hongo, lo que aumentó la cantidad de residuo orgánico en el fieltro. Finalmente la prueba de consolidación dio como resultado que a mayor fieltro, mayor presión mayor es la deformación de la superficie y mayor es el tiempo que le toma recuperarse y volver a su estado inicial. Esto influye negativamente al green, ya que se presentan hundimientos en la superficie de las pisadas de los jugadores, provocando desvíos en la trayectoria de la pelota sobre el green. / In this assay it was tested different amounts of a product which have Trichoderma harzianum as active ingredient with the purpose of a thatch reduction. These applications were done on Agrostis stolonifera nursery in the months of November 2009 until January 2010. The hypothesis raised was that the fungus has the ability to degrade organic matter that decomposes the thatch given a decreasing in the thickness of the layer. It was used a complete randomized block with five repetitions. The thatch height in millimeters, organic matter content in the thatch and a consolidation test were evaluated. The results show up a 40% thatch height reduction with the use of the commercial product, reaching up to 11 mm as a mean height. Organic matter, contrary to what was stated in the hypothesis presented a significant increase. Finally the consolidation test gave as a result that at a higher thatch, higher is the game surface deformation and at a higher pressure the surface deformation is also superior and besides, it takes some time to recover and come back to its initial state.

This Master's Thesis deals with the demand for golf in the Czech Republic. Its aim is to identify the main determinants of the demand for golf and their influence on the golf boom in the Czech Republic. First chapters are devoted to the theory of demand and its determinants. This is followed by a general introduction to golf, namely its brief history in the Czech Republic and the basic specification of the play. The middle part is devoted to the other side of the market, the supply. There are analyzed the status and development of golf infrastructure in terms of different types of golf courses, but also their price. The status and development of the membership of the Czech Golf Federation is analyzed after the supply. A final chapter deals with determinants of demand, whose significance is assessed on the basis of data obtained from the survey.

abstract: This study aimed to investigate the effects of specific macronutrient feedings on competitive golf performance and perceived levels of fatigue and alertness. Participants played three, nine hole rounds of golf, consuming an isocaloric beverage as a control (CON), with the addition of carbohydrate (CHO), or combination of protein and carbohydrate (COM). Physiological and performance measurements were taken before, during, and following each nine hole round. Performance measurements include driving accuracy (DA), driving distance (DD), iron accuracy (IA), chipping accuracy (CA), and putting accuracy (PA). Pre-golf hydration status (urine specific gravity [USG]) and Sweat Rate during golf performance showed no significant differences between trials. All nine hole rounds were performed in ~2 hours. Environmental conditions were similar for all three testing days (mean WBGT=10.946). No significant differences were seen in Driving Distance, Driving Accuracy, and Iron Accuracy for all nine holes between groups receiving different macronutrient feedings. Chipping Accuracy was significantly better in CON trial compared to CHO (p=0.004) and COM (p=0.019). No significant differences were seen in putting make percentages. COM trial significantly lowered Perceived Levels of Fatigue (p=0.019) compared to CON. The CHO trial showed significant improvements in DA compared to CON (13.7 vs. 44.1, p=0.012) and COM (13.7 vs. 33.6, p=0.004) in the first four holes. In the last five holes, the COM trial showed significant improvements in DA compared to CHO (17.5 vs. 29.7, p=0.007). Low Handicap golfers (3 +/- 3) performed significantly better than High Handicap golfers (14 +/- 3.6) in DD (265 vs. 241, p<0.001), DA (15.0 vs. 29.3, p=0.004), IA (15.2 vs. 25.2, p<0.001), CA (52.0 vs. 61.5, p=0.027), and PA 5ft (64% vs. 40%, p=0.003). High Handicap players showed no significant differences between the three trials for any golf performance measurements. Low Handicap players showed significant improvements in DA for COM trial compared to CON trial (13.6 vs. 27.6, p=0.003). The results suggest that carbohydrates at the start and a combination of carbohydrate and protein is beneficial at the second part of 9 holes to improve golf performance and maintain levels of fatigue, however, it needs to be investigated how this knowledge will relate to playing more holes. / Dissertation/Thesis / Masters Thesis Exercise and Wellness 2020

The legacy of monosodium methanearsenate (MSMA) application to golf courses is often arsenic concentrations above the EPA’s maximum contaminant level of 10 μg/L for drinking water and the FDEP soil cleanup target level of 2.1 mg/kg for residential areas. These concentrations pose a health risk and must be remediated for residential development. The objective of this study was to determine how arsenic concentrations vary spatially at a closed golf course poised for residential development. Groundwater and sediment arsenic concentrations were quantified and the controls on arsenic (As) mobility were characterized. The presence of nitrates and iron-(hydr)oxides at the studied golf course largely influenced putting greens having the least As in groundwater whereas roughs contained the most. / Includes bibliography. / Thesis (MS)--Florida Atlantic University, 2021. / FAU Electronic Theses and Dissertations Collection

The driver is the club which receives the greatest scrutiny by golfers and the most marketing efforts by manufacturers. One characteristic often indicated and believed to effect driver performance is the degree of loft on the clubface. The purpose of the current study was to investigate club head speed, ball speed, launch angle, descent angle, total spin, carry, and total distance in an attempt to determine performance measures of three different lofted drivers. Fifteen participants were used to test three different degree drivers (9.5, 10.5, and 13 degree) on the variables listed above. Participants performed ten tested swings for each driver and variables were recorded. Launch angle and carry distance produced no significant differences between clubs. Club head speed, ball speed, total spin, descent angle, and total distance resulted in significant differences when between clubs analysis was conducted. The low lofted driver was found to produce the greatest performance measures.

No description available.

Abstract Introduction: Ball trajectory in the golf swing is an important outcome variable for golf performance, however, no direct investigation of ball flight trajectory variability for pre-elite players has been conducted. Purpose: The purpose of this study was to examine correlations between average score and ball trajectory variability (for carry and lateral displacement) on pre-elite golfers both at and between two different clubs.  Methods: Sixteen pre-elite/elite golfers were included in the study, 11 men and 5 women with a mean age of 22 ±2 (SD). An actual average (mean) score was calculated for each player’s first ten competition rounds. Subjects were then instructed to hit 5 balls, with focus on consistency, with their seven iron and then hit 5 balls approximately 70 metres with their preferred wedge. Ball trajectory variables were recorded using a Flightscope® Kudo Doppler radar launch monitor system (EDH South Africa (PTY) Ltd). Statistical calculation of averages, standard deviation (SD), normalised root-mean, coefficient of variance, performance error index (PEI= and Pearson’s correlation. Results: The results from the present study showed there was no significant correlation between average score (76.2 ±1.9) and variability of ball trajectory, for the seven iron or wedge. Results also showed average seven iron CV for carry and lateral PEIdisplacement was 5% and 3% respectively, whilst average wedge carry CV for carry and lateral PEIdisplacement was 9% and 2% respectively.  Carry CV and Lateral CV PEI were moderately correlated (r=0.61, p=0.012) with each other for the wedge. Conclusion: : Our findings show no correlation between shot variability and golf score, however we found weak correlation between carry and lateral variability for the wedge. In order for effective coaching more understanding into the importance of biomechanical variability and golf performance is required, further research is needed to better understand the implication of our findings