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Investigating the options in the new USGA green construction recommendations |
 | | When the USGA introduced the new version of its green construction recommendations (4) in March 1993, there were several changes made that expanded the types and sizes of materials that can be used in the USGA green profile, including the gravel bed, the intermediate layer, and the root zone mix. |
 | | The USGA method for determining the physical properties of a greensmix does not include putting all three components (greensmix, intermediate layer, and gravel) together in layers when testing, but to test the physical properties of the greensmix in 2" x 3" cylinders separately from the intermediate layer and gravel. |
 | | We thought it would be interesting to construct threelayered models of the USGA methods of golf green construction (the former 12mm intermediate layer method and the two new options) and to compare water permeability rates of the three models with those of the greensmix determined separately under USGA protocol. |
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