Neutron Probe Calibration in a Vertically Stratified Vadose Zone

2004 ◽  
Vol 3 (4) ◽  
pp. 1400 ◽  
Author(s):  
T. Yao ◽  
P. J. Wierenga ◽  
A. R. Graham ◽  
S. P. Neuman
Keyword(s):  
Vadose Zone ◽  
Neutron Probe ◽  
Probe Calibration

scholarly journals Neutron Probe Calibration in a Vertically Stratified Vadose Zone

2004 ◽  
Vol 3 (4) ◽  
pp. 1400-1406 ◽  
Author(s):  
T. Yao ◽  
P. J. Wierenga ◽  
A. R. Graham ◽  
S. P. Neuman
Keyword(s):  
Vadose Zone ◽  
Neutron Probe ◽  
Probe Calibration

EFFECTS OF GYPSUM ON THE NEUTRON PROBE CALIBRATION CURVE

Soil Science ◽  
1994 ◽  
Vol 158 (3) ◽  
pp. 174-180 ◽  
Author(s):  
AWADIS ARSLAN ◽  
ABDUL KARIM RAZZOUK
Keyword(s):  
Calibration Curve ◽  
Neutron Probe ◽  
Probe Calibration

NEUTRON PROBE CALIBRATION BASED ON PLASTIC TRANSFER STANDARDS

Soil Science ◽  
1988 ◽  
Vol 145 (5) ◽  
pp. 381-384 ◽  
Author(s):  
ROBERT J. REGINATO ◽  
FRANCIS S. NAKAYAMA
Keyword(s):  
Neutron Probe ◽  
Probe Calibration

scholarly journals Neutron probe calibration correction by temporal stability parameters of soil water content probability distribution

1997 ◽  
Vol 54 (spe) ◽  
pp. 17-21 ◽  
Author(s):  
K. Reichardt ◽  
O. Portezan ◽  
O.O.S. Bacchi ◽  
J.C.M Oliveira ◽  
D. Dourado-Neto ◽  
...  
Keyword(s):  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Temporal Stability ◽  
Linear Calibration ◽  
Stability Parameters ◽  
Neutron Probe ◽  
Coefficients Of Variation ◽  
Probe Calibration ◽  
Calibration Relations

A neutron probe calibration correction is proposed in order to reduce soil water content variability, assumed to be a consequence of improper calibrations relations. The time stability of spatially measured soil water content data is used to correct the intercepts of linear calibration relations. This procedure reduced the coefficients of variation of soil water content data from 4 to less than 2% in a Rhodic Kanhapludalf.

scholarly journals IDENTITY TEST OF MODELS GENERATED IN NEUTRON PROBE CALIBRATION IN LATOSOL CULTIVATED WITH COFFEE AND SIGNALGRASS

2018 ◽  
Vol 13 (4) ◽  
pp. 519
Author(s):  
Inácio Barbosa Borges ◽  
Omar Cruz Rocha ◽  
Juaci Vitória Malaquias ◽  
Marcelo Fagioli ◽  
Marcos Aurélio Carolino de Sá ◽  
...  
Keyword(s):  
Cover Crops ◽  
Cover Crop ◽  
Bare Soil ◽  
Soil Water Storage ◽  
Regression Curves ◽  
Neutron Probe ◽  
Probe Calibration ◽  
Identity Test ◽  
Linear Regressions

<strong>ABSTRACT: </strong>The sustainability of agricultural production can be improved through the use of cover crops. The objective of this study was to evaluate the Model Identity Method in the verification of equality of linear regressions resulting from the calibration of a neutron probe for different layers, as a function of signalgrass management as a cover crop between rows of soil coffee crop in the Brazilian Central Cerrado. Aluminum tubes were installed to access the probe and two saturation basins were built in a coffee area, irrigated by a central pivot, in an Oxisol, with two management systems, T (Traditional with bare soil) and B (Signalgrass in the row). Samples were taken at depths of 0-0.20; 0.20-0.40; 0.40-0.60; and 0.60-0.80 m for the determination of physical and water properties and monitoring of soil drying; concomitant measurements were taken with the neutron probe in these layers. Two calibration curves were constructed for each layer, which were compared by the above method. It was observed that treatment B yielded differences in soil water storage in the 0.20-0.40 m layer, differing from treatment T. The statistical method allowed the observation of equality of regressions between treatments B and T at depths 0-0.20, 0.40-0.60, and 0.60-0.80 m; it also showed the need for different regression curves per layer, besides justifying the need for neutron probe calibration for each specific local condition.

Neutron Probe Calibration in Unsaturated Tuff

1994 ◽  
Vol 58 (5) ◽  
pp. 1301-1307 ◽  
Author(s):  
A. N. Elder ◽  
Todd C. Rasmussen
Keyword(s):  
Neutron Probe ◽  
Probe Calibration

The effect of the chemical composition of a ferrallitic soil on neutron probe calibration

1994 ◽  
Vol 7 (3) ◽  
pp. 233-247 ◽  
Author(s):  
C. Grimaldi ◽  
M. Grimaldi ◽  
M. Vauclin
Keyword(s):  
Chemical Composition ◽  
Neutron Probe ◽  
Probe Calibration
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