The ASCE Task Committee on Neutron Gauge Calibration met in Logan, Utah in July
1992 to investigate the various methods of soil sampling, installation of access tubes,
effect of various parameters on gauge readings, methods of developing field calibration
curves and comparison of neutron gauge characteristics. Details of the overall objectives
of the study are covered by Stone (1993, this volume). This paper discusses the soil
sampling methods and presents a comparative result based on bulk density, time required
for sampling and cost of sampling equipment Other papers developed from this study
describe the soils, the three sites investigated and the problems related to the tube
installation process
