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----- Original Message ----- 
From: Mark <korney19@adelphia.net>
To: <veggie-list@eskimo.com>
Sent: Thursday, April 05, 2001 4:03 AM
Subject: RE: Cold Protection--READ


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> -----Original Message-----
> From: Connie [k*@jdv.net]
> Sent: Wednesday, April 04, 2001 10:48 PM
> To: veggie-list@eskimo.com
> Subject: Re: Cold Protection--READ
> 
> 
> How do you get off this list?
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> Mark wrote:
> 
> > I received this from Kansas State University. You can sign up for
> their
> > newsletter at http://www.oznet.ksu.edu/dp_hfrr/hnewslet
> >
> > VEGETABLES
> > Protecting Plants from Frost Using Plastic Jugs, Opaque Hot Caps
> > and Wall-O-Water
> >   Research done at Virginia Polytechnic Institute and State
> > University tested common cold weather protectors on tomato
> > plants. They found that plastic jugs (with the bottoms sliced
> > off, caps on at night, off during the day) retain heat poorly.
> > Soil temperature under the jugs decreases rapidly during the
> > evening.  They kept the air temperature about 1.8 degrees F
> > higher than the ambient air temperature for most of the night.
> > Wax-paper hot caps were a bit better, raising the air temperature
> > around the plants by as much as 2.7 degrees F above ambient
> > temperature. The Wall-O-Water maintained a nighttime temperature
> > around the plants as much as 5.4 degrees F warmer than the
> > outside air. It also slowed temperature decline around the plants
> > the most due to the heat retention of the water inside the Wall-
> > O-Water's walls.
> >   The opaque hot caps drastically reduced the amount of solar and
> > photosynthetic energy received by the plants underneath. Although
> > the hot cap plants eventually recovered and developed normally
> > later in the season, the number of fruits on the plants was about
> > half that of the unprotected control plants.
> > Fruits from the plastic jugs actually were five days behind the
> > uncovered plants. Plants capped by the Wall-O-Water and the wax
> > paper showed their first ripe fruit about 7 to 11 days earlier
> > than the uncovered ones, but early fruit were small.
> >      Results show that plant covers provide some protection from
> > cold temperatures and provide earlier small fruit. Perhaps, a
> > better choice is the use of floating row covers made of
> > polyethylene fabrics. This product provides 2 to 5 degrees of
> > freeze protection and allows water and sunlight to penetrate.
> > Planting at the proper time is easier and can be as productive a
> > gardening method. (GE)
> 
>
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