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Volumetric Calibration of Neutron Moisture Probes
Author(s) -
Douglass James E.
Publication year - 1966
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1966.03615995003000050007x
Subject(s) - calibration , outflow , moisture , water content , calibration curve , soil water , neutron probe , neutron , environmental science , soil science , materials science , chemistry , geology , neutron temperature , physics , nuclear physics , geotechnical engineering , meteorology , chromatography , neutron cross section , composite material , quantum mechanics , detection limit
A volumetric method of estimating the slope ( b coefficient) of a neutron moisture probe calibration curve is discussed. Coefficients obtained for three probes by this method did not differ significantly between soil series or between horizons within a series. Simply dividing the count rate in water by 100 gave a value virtually identical to the b coefficient determined volumetrically for these probes and soils. Agreement was excellent between measured outflow and outflow predicted from neutron measurements made with a volumetrically calibrated moisture probe.