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| Web URL(s): | http://archive.lib.msu.edu/tic/rpr/1998/61814,%20STRI,%20Baker.PDF
Last checked: 04/12/2013
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Material Type: | Manuscript |
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| Monographic Author(s): | Baker, Stephen; Binns, Daniel |
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| Author Affiliation: | Baker: Sports Turf Research Institute, United Kingdom; and Binns: Cooperator |
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| Monograph Title: | Layers in Golf Green Construction: 1998 Annual Report, 1998. |
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| Publishing Information: | Bingley, West Yorkshire, United Kingdom: STRI [Sports Turf Research Institute] |
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| # of Pages: | 14 |
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| Collation: | [2], 11, [1] pp. |
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| Abstract/Contents: | "Goals: To examine particle migration from the rootzone layer into underlying gravels of increasing size in situations where no intermediate layer is present.; To assess the effects of different intermediate and drainage layers on moisture retention in the rootzone layer.; To review the particle size criteria for the selection of intermediate layer and drainage layer materials. Particle Migration: Particle migration is being examined for two contrasting rootzone materials placed directly over ten drainage layer gravels of varying sizes. The two rootzones are an 85/15 mix of medium sand and sphagnum peat and a 70/30 mix of medium-coarse sand and peat. Five of the gravels are rounded and the other five are angular and the D15 size values ranged from 2.2 mm to 5.6 mm. Gravel sizes were selected so that in theory no migration should occur from the rootzone into the gravel for the finer gravels but the risk of particle migration into the coarser gravels is high. Each profile is receiving 3000 mm of simulated rainfall before particle migration is examined. A Technique has been developed to examine whether migration has occurred at the interface of the rootzone layer and the gravel (see Figs 1 and 2). The profile is stabilised using plaster of Paris, this is then impregnated with an araldite resin containing fluorescent dye. When the resin has hardened the profile can be sectioned and photographed under ultra-violet light so that we can examine any blockage of the pore space within the gravel as a result of particle migration from the rootzone. Moisture Profiles: The vertical distribution of moisture within the profiles discussed above is being measured after 48 hours of gravitational drainage to examine whether variation in the type of gravel influence moisture retention in the profile. In a separate study the influence of particle size of the intermediate layers on moisture retention with an 80/20 sand/peat rootzone has been examined. The underlying gravel was predominantly a 6-9 mm material while the intermediate layer was based on a 1-4 mm grit but with increasing portions of medium (0.25-0.5 mm) and coarse sand (0.5-1.0 mm). Moisture profiles were assessed after saturation followed by 48 hours gravitational drainage. Increasing proportions of coarse and medium-coarse sand had significant effects on the moisture content of the intermediate layer. For example volumetric moisture content increased from 7.5% when the 1-4 mm grit included no sand to 18.4% when 50% coarse sand was added to the grit. However no strong relationships were found between the composition of the intermediate layer and moisture retention with the rootzone. These data suggest that it should be possible to increase the proportion of material between 0.25 mm and 1 mm in the intermediate layer without significant reduction of water retention in the rootzone. However the work on moisture profiles directly over a gravel base must be completed before firm recommendations are made." |
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| Language: | English |
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| References: | 3 |
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| See Also: | See also related summary article, "Layers in golf green construction", 1998 Turfgrass and Environmental Research Summary [USGA], 1998, p. 8, R=61814. R=61814 |
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| Note: | Also appears as pp. 403-417 in the USGA Turfgrass Research Committee Reporting Binders for 1998.
"DJB"
"27 October 1998"
Pictures, color
Figures
Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
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Last checked: 04/12/2013
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