The Field Calibration of a Neutron Moisture Meter for Soils Under Irrigation in the Bourke District PDF Download
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Author: Nerida Green
Publisher:
ISBN:
Category : Moisture meters
Languages : en
Pages : 103
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Author: Nerida Green
Publisher:
ISBN:
Category : Moisture meters
Languages : en
Pages : 103
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Author: Lake States Forest Experiment Station (Saint Paul, Minn.)
Publisher:
ISBN:
Category :
Languages : en
Pages : 15
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Author: Richard S Sartz
Publisher: Hassell Street Press
ISBN: 9781014577719
Category :
Languages : en
Pages : 22
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Book Description
This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Author: Richard S. Sartz
Publisher:
ISBN:
Category : Measuring instruments
Languages : en
Pages : 38
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Author: Richard S. Sartz
Publisher: Forgotten Books
ISBN: 9781396118463
Category : Technology & Engineering
Languages : en
Pages : 26
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Book Description
Excerpt from Field of Calibration of a Neutron-Scattering Soil Moisture Meter Deviations of the corrected values from the gravimetric values in the upper foot for the respective depth intervals ranged from to inch; from to inch; and from to inch. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: CSIRO (Australia)
Publisher: CSIRO Publishing
ISBN:
Category : Moisture meters
Languages : en
Pages : 156
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Book Description
Application in agriculture, Forestry and Environmental Science. Neutron moisture meter theory. Instrument design. Accuracy, bias and precision. Calibration. Field installation and maintenance. Site selection and representivity. Field practice, data acquisition and processing. Safety aspects.
Author: C. T. Hignett
Publisher:
ISBN: 9780643025325
Category : Moisture meters
Languages : en
Pages : 9
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Book Description
Author: Norman D. Wright
Publisher:
ISBN:
Category : Neutrons
Languages : en
Pages : 290
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Book Description
Soil moisture in a crop's root zone must be regularly monitored to accurately predict crop water requirements. Most irrigation scheduling services currently use the neutron probe to monitor soil moisture. Unfortunately, there is a degree of variability associated with use of the neutron probe creating uncertainty in measurements of soil moisture. A review of the literature reveals there are three major types of error in estimates of average field moisture by the probe: instrument error, calibration error, and location error. Instrument error accounts for random neutron emission by the radioactive probe source. Calibration error is introduced by inaccuracies in the calibration curve. Location error is a result of estimating average soil moisture throughout a field using only point estimates. This study attempts to provide the neutron probe user with a quick and easy means to evaluate estimates of soil moisture by the probe and to identify sources of error. A computer program is developed that quickly and easily analyzes field calibration data to evaluate the error in neutron probe measurements. Field data from Colorado are analyzed as a numerical example of applying the mechanics of the computer model. Similar data from several California soils are analyzed using the model to show how the range of moisture content over which the probe is calibrated restricts accurate neutron probe measurements to the range of calibration data. The Colorado data are further analyzed to determine to what extent measurement errors occuring in the calibration process will contribute to calibration error in general. In most cases, neutron probe access tubes are placed at biased locations within a field and not randomly as is assumed in the model. A method is developed to correct estimates of average field moisture by taking this discrepancy into account. Given the variability of field moisture content, the number of access tubes that must be sampled to achieve a desired level of accuracy may be calculated using the definition of the student's "t" parameter and referring to specific confidence intervals.
Author: Lawrence John Schwankl
Publisher:
ISBN:
Category : Nuclear physics
Languages : en
Pages : 486
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Book Description
Author: Cornelius H. M. Van Bavel
Publisher:
ISBN:
Category : Soil moisture
Languages : en
Pages : 40
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Book Description
