Research Projects

This page contains abstracts and reports taken from a sample of ongoing or completed studies. The research has been categorized into five categories: 1) Water-Use Efficiency, 2) New Turfgrass Development and Establishment, 3) Chemical and Fertilizer Environmental Impacts, 4) Unbiased Product Testing, and 5) Sports Turf Management.

Please note that additional research summaries can be found on the UCRTRAC page on this website.

Updated Sept. 2008

Water Use Efficiency

Functional Turfgrass Performance with Reduced Resource Input
The objective of this study, which was conducted at the UC South Coast Research and Extension Center in Irvine, was to evaluate various aspects of quality of four turfgrass that were chosen for reduced-input practices, when irrigated with calculated optimum and less than optimum irrigation regimes and maintained with varying moderate to low level of nitrogen fertilization.

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New Turfgrass Development and Establishment

Turfgrass Cultivar Evaluations
The National Turfgrass Evaluation Program (NTEP) is a non-profit organization that provides leadership in turfgrass evaluation and improvement by linking the public and private sectors of the industry through their common goals of grass development, improvement, and evaluation. Its mission is to provide a mechanism for uniform evaluations; to advance the science of species and cultivar evaluation; to collect and disseminate performance information; and to enhance the transfer and use of information and technology relating to turfgrass improvement and evaluation. Five-year-long studies that examined the performance of cultivars of tall fescue, buffalograss, bermudagrass and zoysiagrass at the UCR Turfgrass Facility have been completed. The results of our findings, as well as the performance results of the same grasses at other US locations, can be found at www.ntep.org.

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Chemical and Fertilizer Environmental Impacts

Nitrogen Leaching and Best Management Practices for Overseeded Bermudagrass Fairways
The objective of this study was to investigate the effect of soil type (sandy loam or loamy sand), annual nitrogen-fertility program (6.0 and 3.0 lb N/1000 ft2 or 5.0 and 5.0 lb N/1000 ft2 for a 24- to 27-week cool season and a 22- to 23-week warm season, respectively), and irrigation amount (100% or 130% ET crop/distribution uniformity) on NO3-N leaching.

Use of Compost in Turfgrass Management
This study evaluates the effect of composted green waste/biosolids as a soil amendment on the quality of bermudagrass with and without simulated sports traffic. Water infiltration rate, surface hardness and surface elevation changes are also observed.

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Unbiased Product Testing

The Evaluation of Slow-Release Nitrogen Fertilizers Applied on Arizona Common Bermudagrass During the Warm Season
The objective of this study was to evaluate the performance of slow-release nitrogen (N) fertilizers, and a fast-release N fertilizer, in terms of visual turfgrass quality and color, when applied during the warm season on an Arizona common bermudagrass that is maintained similar to fairway conditions.

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Sports Turf Management

The Effect of Putting Green Cultural Practices on Traffic Tolerance
Nitrogen and potassium fertility, core cultivation and vertical mowing are studied in various combinations to determine the best package of cultural practices to overcome the effect of simulated golf traffic on a creeping bentgrass putting green.

Seeded Bermudagrass Fall Color Retention
The objective of this project was to examine cultural programs that influence dormancy or turfgrass color loss of three seeded bermudagrasses during the late fall and winter in Riverside, California.

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