RE: measurement in irrigated plantations

[Alan Kottwitz]

FYI,
There are 2 large (about 35000 acres total) irrigated hybrid cottonwood
fiber farms located in Oregon and Washington using Neutron probes to measure
soil moisture for operational irrigation scheduling purposes. 

We are using crosses of several species of Populus, Trichocarpa, Deltoides
and Nigra primarily.

Most of the work is proprietary but there has been some work done by the Oak
Ridge National Laboratory that was recently published in Tree Physiology,
principally authored by T. Tschaplinski and G. Gebre on drought resistance
and osmotic potential.

I have used other devices (tensiometers, TDR, Watermark, stem flow) for
research purposes.

Alan Kottwitz
Irrigation Supervisor
Boise Cascade Fiber Farm
Wallula Washington

> -----Original Message-----
> From:	owner-sowacs@aqua.ccwr.ac.za [SMTP:owner-sowacs@aqua.ccwr.ac.za]
> Sent:	Friday, December 11, 1998 3:50 PM
> Subject:	Re: measurement in irrigated plantations
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> There is a sowacs webpage covering irrigated plantations - 
> 
> http://www.sowacs.com/irrigation/irrigation.html
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> Thanks to all the leads generated this last week, I will have to get busy
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> Season's greetings to all members..
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> --
> Bruce Metelerkamp
> owner sowacs list and website: soil water content sensor discussion
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