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NOTE: To get off this list, send email to majordomo@aqua.ccwr.ac.za with the body of the message containing the line: unsubscribe sowacs Dear Bruce, Before I left the german Federal research center of agriculture, I managed to write an article "Variability in soil moisture measurements" for Irrigation Science on the topic of my Phd, "soil moisture measurements for irrigation scheduling". My thesis is in german, so probably not of much interest to the scientific community, but I thought you might find the article of interest. If so, I wanted to ask you if you would like to reference it on SoWaCS, like you do with some other articles. If you are interested, I can send you the full article for review, but it cannot be made public as it is, since springer holds the copyright. I placed the abstract of the article and Springers copyright statement below. Best wishes Martin Schmitz ---------------------------------------------------------------------------- -------- Martin Schmitz , Heinz Sourell Variability in soil moisture measurements Irrig Sci (2000) 19: 147-151 (c) Springer-Verlag 2000 Received: 23 June 1999 Abstract This study was undertaken to describe and quantify the measurement uncertainty of commercially available soil moisture sensors in the field. Three dif- ferent commercial types of soil moisture sensors (TDR, EC and GMS sensors) were placed in groups of 25 sensors each under turf on a 3 by 3 m plot. Readings were taken daily over a period of 10 weeks in order to estimate the extent of measurement scattering and to estimate the change of scattering with time. It was found that, on average, scattering changes significantly with time and changing moisture content, and is generally very high (mean absolute deviation up to 16% available field capacity) for the purpose of irrigation scheduling. The difference in scattering between the three methods was significant, so it would be fruitful to seek methods with lower scattering. The assumption that scattering of measurements relative to a starting point is lower than absolute values could not be confirmed. ---------------------------------------------------------------------------- ---- Dear Author: Please find attached the pdf file of your contribution, which can be viewed using the Acrobat Reader, version 3.0 or higher. We would kindly like to draw your attention to the fact that copyright law is also valid for electronic products. This means especially that: * You may not alter the pdf file, as changes to the published contribution are prohibited by copyright law. * You may print the file and distribute it amongst your colleagues in the scientific community for scientific and/or personal use. * You may make an article published by Springer-Verlag available on your personal home page provided the source of the published article is cited and Springer-Verlag is mentioned as copyright holder. You are requested to create a link to the published article in LINK, Springer's internet service. The link must be accompanied by the following text: The original publication is available on LINK http://link.springer.de. Please use the appropriate URL and/or DOI for the article in LINK. Articles disseminated via LINK are indexed, abstracted and referenced by many abstracting and information services, bibliographic networks, subscription agencies, library networks and consortia. * You are not allowed to make the pdf file accessible to the general public, e.g. your institute/your company is not allowed to place this file on its homepage. Yours sincerely, Springer-Verlag Berlin Heidelberg