Error Analysis of Bulk Density Measurements for Neutron Moisture Gauge Calibration

by Richard G. Allen, Utah State Univ, Logan, United States,
Gylan Dickey, Utah State Univ, Logan, United States,
James L. Wright, Utah State Univ, Logan, United States,
John F. Stone, Utah State Univ, Logan, United States,
Doug J. Hunsaker, Utah State Univ, Logan, United States,



Document Type: Proceeding Paper

Part of: Management of Irrigation and Drainage Systems: Integrated Perspectives

Abstract: Six bulk density sampling methods were evaluated for use in neutron gauge calibration. All six methods provided estimates of bulk density which were generally within 5% of bulk density profiles measured using a gamma probe. Standard errors of estimate ranged from 3 to 7%. When used with care, downhole, coring, and drive samplers can be used to successfully measure soil moisture and bulk density profiles for use in neutron probe calibration.

Subject Headings: Calibration | Probe instruments | Density (material) | Errors (statistics) | Soil water | Gamma function | Soil analysis | Moisture

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