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Tom, Assuming that the theta probe is comparable with TDR for monitoring soil moisture you may want to look at the correlations discussed in the following: Schofield, T. G., G. J. Langhorst, G. Trujillo, K. V. Bostick, and W. R. Hansen. 1994. Comparison of Neutron Probe and Time Domain Reflectometry Techniques of Soil Moisture Analysis. Proceedings of the Symposium on Time Domain Reflectometry in Environmental, Infrastructure, and Mining Applications, Evanston, Illinois, Sept 7-9, U.S. Bureau of Mines, Special Publication SP 19-94, NTIS PB95-105789, pp. 130-142 Dasberg, S. and F.N. Dalton. 1985. Time Domain Reflectometry Field Measurements of Soil Water Content and Electrical Conductivity. Soil Sci. Soc. Am. J., Vol. 49, pp. 293-297. Sincerely, Kevin O'Connor http://www.geotdr.com At 07:42 PM 8/10/98 GMT, you wrote: >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 > >From: tomrinaz@juno.com (Tom A Reynolds) > >Does anyone out there have any correlation data from neutron probe and >theta probe? I've noticed that theta probe unit pricing is coming into >more reasonable range (for quantities), getting seriously close to >preparing a purchase requisition, but still haven't any raw data to >analyze. I'm sure the technical committee will want to know by which >standard have I made my selection of this particular device. > >_____________________________________________________________________ >You don't need to buy Internet access to use free Internet e-mail. >Get completely free e-mail from Juno at http://www.juno.com >Or call Juno at (800) 654-JUNO [654-5866] > > > > ++++++++++++++++++++++++++++++++++++++++++++++++++ Kevin O'Connor, Ph.D. (612) 431-3415 voice GeoTDR, Inc. (612) 892-0241 fax 297 Pinewood Drive kevin@geotdr.com Apple Valley, MN 55124 http://www.geotdr.com +++++++++++++++++++++++++++++++++++++++++++++++++