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Browsing by Author "Keeley, Steven J."

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Effects of high temperature and drought on a hybrid bluegrass compared with Kentucky bluegrass and tall fescue

Su, Kemin; Bremer, Dale J.; Keeley, Steven J.; Fry, Jack D. (2007)

High temperature and drought stresses may reduce quality in cool-season turfgrasses during summer months in the transition zone. This growth chamber study was conducted to evaluate effects of high temperature and drought ...
In-ground irrigation systems affect lawn-watering behaviors of residential homeowners

Bremer, Dale J.; Keeley, Steven J.; Jager, Abigail L.; Fry, Jack D.; Lavis, Cathie C. (2012)

Urbanization is increasing the land area covered with turfgrasses, which may have implications for water quantity and quality. The largest sector of turfgrass is residential lawns. Our objectives were to compare lawn-irrigation ...
Mowing and drought effects on a hybrid bluegrass compared with a Kentucky bluegrass

Su, Kemin; Bremer, Dale J.; Keeley, Steven J.; Fry, Jack D. (2009)

Hybrid bluegrasses (HBG) resemble Kentucky bluegrass (Poa pratensis L.)(KBG) but HBG may have greater heat and drought tolerance. Little is known about the performance of HBG under low mowing heights and during drought. A ...
Relationships between NDVI and visual quality in cool-season turfgrass: II. Factors affecting NDVI and its component reflectances.

Bremer, Dale J.; Lee, Hyeonju; Su, Kemin; Keeley, Steven J. (2011)

Normalized difference vegetation index (NDVI, computed as [near infrared (NIR) – Red)]/[NIR + Red]) may provide an objective means to evaluate visual quality of turfgrass. The NDVI is influenced by red (visible) and NIR ...
Relationships between NDVI and visual quality in turfgrasses: Effects of mowing height

Lee, Hyeonju; Bremer, Dale J.; Su, Kemin; Keeley, Steven J. (2011)

Canopy spectral reflectance may provide an objective means to evaluate visual quality of turfgrass, but evaluations of quality may be confounded by cultural practices that affect refl ectance, such as mowing height. ...
Rooting characteristics and responses of photosynthesis to irrigation deficit of two hybrid bluegrasses, Kentucky bluegrass, and tall fescue

Su, Kemin; Bremer, Dale J.; Keeley, Steven J.; Fry, Jack D. (2008)

Drought stress is common among cool-season turfgrasses during summer in the U.S. transition zone. A two-year field study was conducted near Manhattan, Kansas, USA, to evaluate rooting characteristics and effects of drought ...
Wilt-based irrigation in Kentucky bluegrass: effects on visual quality and irrigation amounts among cultivars

Lewis, Jason D.; Bremer, Dale J.; Keeley, Steven J.; Fry, Jack D. (2012)

A critical challenge facing the turf industry is increasingly limited water supplies. Identifying cultivars that use less water while maintaining acceptable quality may mitigate irrigation demands. Our objectives were ...

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