1.1 These test methods cover the measurements of saturated hydraulic conductivity, water retention, porosity (including distribution of capillary an air-filled porosity at a known matric potential), and particle and bulk densities on root zone mixes to be used to for construction and topdressing of golf course putting greens including United States Golf Association (USGA) recommended greens or other highly trafficked turfgrass areas

1.2 Water retention is not a required measurement for USGA Recommended greens. Its inclusion in these test methods is for the benefit of those who wish to continue to obtain such data. Likewise, bulk density is no longer a physical parameter required in the evaluation of USGA root zone mixes, but is must be determined for calculation of total and capillary porosity.

1.3 The values stated in SI units are to be regarded as the standard. The inch-pound units given in parentheses are for information only.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.