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| DOI: | 10.2135/cropsci2008.01.0056 |
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| Web URL(s): | https://dl.sciencesocieties.org/publications/cs/pdfs/48/6/2437
Last checked: 11/16/2016
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https://dl.sciencesocieties.org/publications/cs/articles/48/6/2437
Last checked: 11/16/2016
Access conditions: Item is within a limited-access website |
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| Publication Type:
| Refereed |
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| Author(s): | Berndt, William L. |
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| Author Affiliation: | Division of Professional and Technical Studies, Edison College, Fort Myers, Florida |
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| Title: | Double exponential model describes decay of hybrid bermudagrass thatch |
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| Section: | Turfgrass science
Other records with the "Turfgrass science" Section
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| Source: | Crop Science. Vol. 48, No. 6, November/December 2008, p. 2437-2446. |
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| Publishing Information: | Madison, WI: Crop Science Society of America |
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| # of Pages: | 10 |
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| Related Web URL: | https://dl.sciencesocieties.org/publications/cs/abstracts/48/6/2437
Last checked: 11/16/2016
Notes: Abstract only |
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| Keywords: | TIC Keywords: Thatch decomposition; Models; Hybrid bermudagrasses; Cultivar evaluation; Microbial activity; Carbon dioxide; Measurement; Carbon; Mineralization
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| Abstract/Contents: | Empirical modeling helps understand decay processes. THe objective of this research was to find a suitable model, and then use it to describe decay of thatch from hybrid bermudagrass [Cynodon dactylon (L.) Pers. x Cynodon transvaalentsis Burtt-Davy]. The carbon dioxide-carbon released from 'Tifdwarf' and 'Tifeagle', each 24 h over 20 d, was plotted as percent C remaining vs. time. Four empirical models were fit to these data to determine which one best minimized residual sum of squares. The model best meeting this condition was the four-parameter double exponential model. Of the models tested, it was the only one to pass all tests for normally distributed population, constant variance, and independence of residuals. Fitting this model to percent C remaining data identified two C pools for each cultivar, a fast pool and a slow pool, with difference sizes and rate constants. Fast-pool turnover times differed, with Tifdward decaying faster than Tifeagle, which may have been a function of Tifeage having a higher stolon mass with more lignin and a wider C:N. When data were corrected for microbial growth efficiency, slow-pool turnover times decreased. This implied cultural practices that increase microbial growth efficiency may help convert slow pool into biomass, reduce slow pool turnover times, and ultimately enhance the decay of thatch. |
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| Language: | English |
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| References: | 49 |
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| Note: | Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Berndt, W. L. 2008. Double exponential model describes decay of hybrid bermudagrass thatch. Crop Sci. 48(6):p. 2437-2446. |
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| DOI: 10.2135/cropsci2008.01.0056 |
| Web URL(s):
https://dl.sciencesocieties.org/publications/cs/pdfs/48/6/2437
Last checked: 11/16/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website
https://dl.sciencesocieties.org/publications/cs/articles/48/6/2437
Last checked: 11/16/2016
Access conditions: Item is within a limited-access website |
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MSU catalog number: b2211522a |
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