
%0 Journal Article
%A C&aacute;ssaro, F. A. M. 
%A Tominaga, T. T. 
%A Bacchi, O. O. S. 
%A Reichardt, K. 
%A Oliveira, J. C. M. 
%A Timm, L. C. 
%T Improved laboratory calibration of a single-probe surface gamma-neutron gauge
%J Soil Research
%D 2000/08/30
%V 38
%N 5
%P 937-946
%K gamma-ray attenuation, backscatter, soil bulk density.
%R https://doi.org/10.1071/SR99107
%U https://www.publish.csiro.au/paper/SR99107 
%X Surface gamma-neutron gauges are extensively used for the determination of soil physical properties such as density. Substantial differences are sometimes observed between density values provided by these gauges when using factory-supplied calibrations and gravimetric density measurements. These differences can be as high as 16%. In this paper it is shown that, using homogeneous materials with different known densities covering a wider range, it is possible to find a better calibration equation. This calibration provides density values in agreement with gravimetric measurements. 
