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HELLO WATER PEOPLE
Here are a few papers that may be of interest:
in particular, the sub-zero measurement of soil water potential
is addressed in:
Gorden DS & Veneman PLM. 1995
Soil water pressure measurements in subzero air temperatures
SSSAJ 59:5 1242-1243
and
Examining the use of TDR for measuring liquid water content in
frozen soil. Spaans EJA and Baker JM. 1995. Water Resources
Research 31:12 2917-2925
The TDR probe insulating controversy is covered in: [although I
haven't yet read it - if someone would be kind enough to provide
a precis??)
Ferre PA, Rudolph DL & Kachanoski RG.
Spatial averaging of water content by time domain reflectometry:
Implications for twin rod probes with and without dielectric
coatings. 1996.
Water Resources Research 32:2 271-279
and they've been busy down in Texas!
Noborio K, McInnes KJ, & Heilman JL.
Measurement of soil water content, heat capacity, and thermal
conductivity with a single TDR probe. 1996.
Soil Science 161:1 22-28
but Steve Evett is not to be outdone!
Evett SR & Steiner JL. 1995. Precision of neutron scattering and
capacitance type soil content gauges from field calibration.
SSSAJ 59:4 961-968
In South Africa, the neutron probe is still being used for
irrigation scheduling...perhpas some of the problems are solved
in this paper?
Irrigation management on large farms, with special reference to
the use of a neutron hydroprobe.
Nel FJ. 1995. Proceedings of the Southern African Irrigation
Symposium, Water Research Commission Report no TT 71/95.
p 305-307
WRC, PO Box 824, Pretoria, 0001, South Africa
(This proceedings has a number of papers that may be of interest
to irrigators other than those in Southern Africa).
cioa
Bruce
Regards
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.
Bruce Metelerkamp SOIL WATER RESEARCH OFFICER
Institute for Commercial Forestry Research,
University of Natal, PO Box 100281
Scottsville, ZA3209
Rep. of South Africa Voice:27 331 62314
E-mail: bruce@icfr.unp.ac.za FAX:27 331 68905
brooz@pobox.com
Bruce.Metelerkamp@pobox.com
URL http://www.icfrnet.unp.ac.za/~metele
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