Download or read book Review of Techniques for Measuring Soil Moisture in Situ written by Harlan L. McKim and published by . This book was released on 1980 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recently there has been an increased interest in the in-situ measurement of soil moisture content in the areas of hydrology, meteorology, agriculture and environmental studies. Current methods generally have limitations, depending upon the use of the data, that greatly influence acquisition and reliability of the soil moisture determination. This report discusses gravimetric, nuclear, electromagnetic, tensiometric and hygroscopic techniques and the advantages and disadvantages of using the technique. Emphasis is placed on the tensiometric and electromagnetic techniques. These two measurements when coupled together would supply information on the wetting and drying soil moisture characteristic curves and thereby provide a means of tracing moisture movement under field conditions in cold climates. (Author).
Download or read book Review of Techniques for Measuring Soil Moisture In Situ written by Harlan L. McKim and published by . This book was released on 1980 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recently there has been an increased interest in the in-situ measurement of soil moisture content in the areas of hydrology, meteorology, agriculture and environmental studies. Current methods generally have limitations, depending upon the use of the data, that greatly influence acquisition and reliability of the soil moisture determination. This report discusses gravimetric, nuclear, electromagnetic, tensiometric and hygroscopic techniques and the advantages and disadvantages of using the technique. Emphasis is placed on the tensiometric and electromagnetic techniques. These two measurements when coupled together would supply information on the wetting and drying soil moisture characteristic curves and thereby provide a means of tracing moisture movement under field conditions in cold climates. (Author).
Download or read book Soil Water Assessment by the Neutron Method written by CSIRO (Australia) and published by CSIRO Publishing. This book was released on 1981 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Remote Sensing of Energy Fluxes and Soil Moisture Content written by George Petropoulos and published by CRC Press. This book was released on 2013-10-28 with total page 562 pages. Available in PDF, EPUB and Kindle. Book excerpt: Integrating decades of research conducted by leading scientists in the field, Remote Sensing of Energy Fluxes and Soil Moisture Content provides an overview of state-of-the-art methods and modeling techniques employed for deriving spatio-temporal estimates of energy fluxes and soil surface moisture from remote sensing. It also underscores the range
Download or read book In Situ Methods of Measuring Soil Moisture Content written by Bernard Albert Eastwell and published by . This book was released on 1953 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Methods of Measuring Soil Moisture in the Field written by Arnold Ivan Johnson and published by . This book was released on 1962 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Evaluates methods for measuring soil moisture and describes the equipment used.
Download or read book Analysis of Methods and Equipment for Measuring Soil Moisture written by Mark D. Shaw and published by . This book was released on 1960 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1992 with total page 1572 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book CRREL Technical Publications written by Cold Regions Research and Engineering Laboratory (U.S.) and published by . This book was released on 1981 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil Water Measurement written by J. David Cooper and published by John Wiley & Sons. This book was released on 2016-01-19 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is written for all those involved in measurement of soil water phenomena, whether they be environmental scientists, field technicians, agronomists, meteorologists, hydrogeologists, foresters, physical geographers, civil or water engineers or students in these subjects. It contains a comprehensive description of all the major methods used for measurement of soil water content and potential, solute concentration, transport and balance of water and solutes, including recharge to groundwater aquifers. The emphasis is firmly on techniques which can be applied in the field or on samples obtained from the field. The theory and practice of the workings of the main instruments and methods available is described, along with practical tips on surmounting some of the main difficulties and explanations of many commonly encountered jargon words.
Download or read book The Measurement of Soil Moisture in Situ written by Peter Forsyth Butler and published by . This book was released on 1950 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Evaluates the Bouyoucos electrical resistance method of measuring soil moisture in situ; and studies the soil moisture under a simple crop rotation. Has been the subject of 2 papers entiled: Techniques associated with the use of gypsum block soil moisture meters / Aitchinson, Butler and Gurr; and, Gypsum block moisture meters as instruments for the measurement of tension in soil water / Aitchinson and Butler. The papers are attached. Part A includes a brief summary and discussion of these papers.
Download or read book Examining Multiple Techniques to Interpolate Discrete Soil Moisture Measurements Using a Large Scale Lysimeter Facility written by Melisa Kopan and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil moisture is a crucial component for understanding the agricultural soil water budget. In situ, soil moisture measurements are generally taken using soil moisture probes inserted at discrete depths within the profile. The characterization of the total moisture content found within the soil water profile for the agricultural water budget is generally determined through linear interpolations. This research used a large-scale lysimeter facility to evaluate the accuracy to which a linear interpolation can characterize a soil water profile. Results identified that a linear interpolation can describe the profile with normalized root mean square errors of 4.38% and 4.5% for silt loam and sandy loam soils, respectively, between actual and predicted daily soil water storage. Other interpolation methods (e.g., soil weighted average, inverse distance weighting, geophysical techniques, and cubic splines) were then employed to determine if the estimations of water budget estimates could be improved. A geophysical weighting technique showed the most promising improvement for estimation of the soil water profile for the sandy loam soils, while a linear interpolation remained the best method for the silt loam soils. Findings suggest that soil texture analysis is beneficial in determining the type of interpolation required.
Download or read book Investigating the Upscaling of in Situ Soil Moisture Measurements for Satellite Validation written by William Woodley and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Remote sensing instruments can provide soil moisture estimations at spatial scales impossible with in situ measurements. Assessment of remotely sensed estimations requires development of calibration and validation data sets with the in situ measurements and through calculation of an areal mean soil moisture (AMSM) using upscaling approaches. However, justification as to the choice of upscaling method is rarely given. This research evaluates six upscaling methods and their resultant AMSM values using soil moisture measurements from an in situ network in Kenaston, Saskatchewan. Applying the upscaling methods to network data obtained over the 2015 growing season, this research compares differences between methods, and their different AMSM values against the Soil Moisture Active Passive (SMAP) remotely sensed retrievals. Disparities between methods appear to be the result of a number of factors including soil texture influencing heterogeneous drying patterns, heterogeneous precipitation across the network and the methods weighting scheme for individual stations. These results demonstrate that method agreement is highest during saturated conditions and that high variation between stations within the network could indicate when to exercise caution regarding validation activities.
Download or read book Electrical methods for in situ measurements of soil moisture content written by Fabrizio Benincasa and published by . This book was released on 2001 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The National Research Council Review written by National Research Council of Canada and published by . This book was released on 1954 with total page 610 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Methods of Soil Analysis Part 4 written by Jacob H. Dane and published by John Wiley & Sons. This book was released on 2020-05-27 with total page 1744 pages. Available in PDF, EPUB and Kindle. Book excerpt: The best single reference for both the theory and practice of soil physical measurements, Methods, Part 4 adopts a more hierarchical approach to allow readers to easily find their specific topic or measurement of interest. As such it is divided into eight main chapters on soil sampling and statistics, the solid, solution, and gas phases, soil heat, solute transport, multi-fluid flow, and erosion. More than 100 world experts contribute detailed sections.
Download or read book Proximal Soil Sensing written by Raphael A. Viscarra Rossel and published by Springer Science & Business Media. This book was released on 2010-07-25 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reports on developments in Proximal Soil Sensing (PSS) and high resolution digital soil mapping. PSS has become a multidisciplinary area of study that aims to develop field-based techniques for collecting information on the soil from close by, or within, the soil. Amongst others, PSS involves the use of optical, geophysical, electrochemical, mathematical and statistical methods. This volume, suitable for undergraduate course material and postgraduate research, brings together ideas and examples from those developing and using proximal sensors and high resolution digital soil maps for applications such as precision agriculture, soil contamination, archaeology, peri-urban design and high land-value applications, where there is a particular need for high spatial resolution information. The book in particular covers soil sensor sampling, proximal soil sensor development and use, sensor calibrations, prediction methods for large data sets, applications of proximal soil sensing, and high-resolution digital soil mapping. Key themes: soil sensor sampling – soil sensor calibrations – spatial prediction methods – reflectance spectroscopy – electromagnetic induction and electrical resistivity – radar and gamma radiometrics – multi-sensor platforms – high resolution digital soil mapping - applications Raphael A. Viscarra Rossel is a scientist at the Commonwealth Scientific and Industrial Research Organisation (CSIRO) of Australia. Alex McBratney is Pro-Dean and Professor of Soil Science in the Faculty of Agriculture Food & Natural Resources at the University of Sydney in Australia. Budiman Minasny is a Senior Research Fellow in the Faculty of Agriculture Food & Natural Resources at the University of Sydney in Australia.
