Re: OT: wind chill and plants
From: Dana Brown <ddbro@llano.net>
I have been told by several irisarians that humiditure is VERY important to
iris. According to them when the humiditure reaches 150 iris are in danger of
rotting. Since that happens so seldom here I can't swear to it but the people
who have come up with the idea are in areas that would definitely have to deal
with a humiditure of 150. Maybe some of our "talkers" should do an informal
survey this year.
Gmbeasle@aol.com wrote:
> From: Gmbeasle@aol.com
>
> In a message dated 01/18/2000 10:50:51 AM Eastern Standard Time,
> BILLS@hsc.edu writes:
>
> > I wonder if wind chill is as important to low-growing plants as it is to
> > humans. Wind chill temperatures are calculated as their effect on us. It
> > can be quite different within a foot of the ground, where wind velocities
> > are much slower.
> >
> > Can anyone enlighten us on this?
>
> I don't think wind chill is an issue with plants at all. Wind chill is just
> how difficult it is for warm blooded animals to maintain their body
> temperature. i.e. how fast the wind carries the heat away from the surface.
> Neither plants nor machines (such as car engines) need to take wind chill
> into account.
>
> Just as the humiture index, or the heat stress index is a mammalian thing,
> and not a problem for plants.
>
> Wind can do other things to plants, such as dehydrate them. But I think
> that's more a function of the speed and moisture of the air rather than the
> temperature.
>
> RosalieAnn the industrial health person who asked that question about her
> car engine last year, in Baltimore, MD USA.
>
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--
d*@llano.net
Dana Brown
Pres. South Plains Iris Society
Lubbock, TX 79401
Zone 7 USDA, Zone 10 Sunset
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