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| Web URL(s): | https://stri.lib.msu.edu/vol77-2001/pdf/sptri00077038.pdf
Last checked: 09/19/2005
Requires: PDF Reader
Notes: Available to TGIF and STRI users |
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| Access Restriction: | Certain MSU-hosted archive URLs may be restricted to legacy database members. |
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| Publication Type:
| Refereed |
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| Author(s): | Crossley, F. M. E.;
Newell, A. J. |
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| Author Affiliation: | The Sports Turf Research Institute, St. Ives Estate, Bingley, West Yorkshire, United Kingdom |
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| Title: | Visual and objective colour measurements of "Stay Green" and traditional grass mixtures |
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| Source: | Journal of Turfgrass Science. Vol. 77, 2001, p. 38-46. |
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| Publishing Information: | Bingley, West Yorkshire, UK: The Sports Turf Research Institute |
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| # of Pages: | 9 |
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| Keywords: | TIC Keywords: Visual evaluation; Color; Relationships; Lolium perenne; Seasonal variation; Correlation; Perceptions
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| Cultivar Names: | Staygreen |
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| Abstract/Contents: | "The relationships between visual greenness scores and objectively measured colour parameters (lightness - L*, greenness - a*, yellowness - b* and hue angle - H°) were investigated among different grass mixtures, some of which contained 'Stay Green' perennial ryegrass. In winter, perceived greenness was strongly associated with a* and H°. Perceived greenness was also negatively associated with a* and H°. In summer, strong associations were found between visual colour and a* and H°. At this time, there was no association with b* values. Within these comparisons, mixtures that contained 'Stay Green' material were generally greener and relatively less yellow in winter. It is suggested that effects of the 'Stay Green' trait on the colour of different grass mixtures can be assessed both visually and objectively using a colour meter. Correlation matrices are presented which examine the relationships among the different colour assessments and visual quality. In winter, visual quality, visual greenness, a* and H° were all strongly correlated. In this regard, visual quality was higher for mixtures that were subjectively and objectively greener. In contrast, there was a negative association between visual quality and b*. In the summer, there were significant correlations among visual greenness, a* and H°. In both summer and winter, L* and b* were significantly and positively correlated. The effects of visual and objective colour difference on perceived turfgrass quality is discussed. It is concluded that 'Stay Green' grasses can increase the greenness and perceived visual quality of grass mixtures." |
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| Language: | English |
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| References: | 13 |
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| Note: | Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Crossley, F. M. E., and A. J. Newell. 2001. Visual and objective colour measurements of "Stay Green" and traditional grass mixtures. J. Sports Turf Res. Inst. 77:p. 38-46. |
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| Web URL(s):
https://stri.lib.msu.edu/vol77-2001/pdf/sptri00077038.pdf
Last checked: 09/19/2005
Requires: PDF Reader
Notes: Available to TGIF and STRI users |
| 
MSU catalog number: SB 433 .A1 S63 |
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