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| Web URL(s): | http://archive.lib.msu.edu/tic/rpr/2000/72112,%20Colorado%20State, Miller, SHC.PDF
Last checked: 02/06/2013
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Material Type: | Manuscript |
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| Monographic Author(s): | Miller, Robert O. |
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| Author Affiliation: | Colorado State University, USGA-PT Program Coordinator |
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| Monograph Title: | SHC Study: Project Progress Report October 16, 2000, 2000. |
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| Publishing Information: | [Fort Collins, Colorado]: Colorado State University |
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| # of Pages: | 11 |
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| Collation: | [1], 10 pp. |
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| Abstract/Contents: | "The Saturated Hydraulic Conductivity project was initiated in 1999 to evaluate documented variability problems in the saturated hydraulic conductivty (Ksat) method and develop a revised method for use by the rootzone testing lab industry. Phase I of this project was to complete a laboratory site assessments of each of the testing laboratories to evaluate the implementation of ASTM method 1815-97 used to determine Ksat. Results indicate the current method insufficiently describes cylinder loading (step 1) and column saturation (step 2) of the method which contributes to inter-lab method variability in Ksat, capillary and non-capillary moisture values. As a result of the Site Assessments, phase II of the study was initiated to address the impact of antecedent (initial sample moisture upon laboratory reception) on Ksat values. Results from four testing labs indicate with increases antecedent moisture from 1.0% to 14%, Ksat values falls substantially dependent upon lab and root zone material source. Antecedent moisture variability only effects Ksat values and has no bearing on capillary, non capillary or bulk density parameters. Preliminary results suggest that antecedent moisture contents between 6 and 10% have little influence on Ksat values Phase III of the study was to develop standard reference Ksat columns for assessing percolation tables used by the testing labs. Five standard reference columns have been constructed and tests indicate that these columns provide very consistent Ksat values. Based on these results proposed revisions to ASTM 1815-97 will need to: (1) specify a antecedent moisture of root zone mixes; (2) develop standardized cylinder loading techniques; and (3) all percolation table designs used in the testing labs will need to be evaluated using standard reference Ksat columns." |
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| Language: | English |
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| References: | 0 |
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| See Also: | See also related summary article, "Saturated hydraulic conducitivty study", 2000 Turfgrass and Environmental Research Summary [USGA], 2000, p. 10, R=72112. R=72112 |
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| Note: | Pictures, b/w
Tables
Graphs
"Project Progress Report October 16, 2000"
Also appears as pp. 139-149 in the USGA Turfgrass Research Committee Reporting Binders for 2000 |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
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Last checked: 02/06/2013
Requires: PDF Reader |
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