Re: Re: CULT Solarization & manure
- To: iris-talk@onelist.com
- Subject: Re: [iris-talk] Re: CULT Solarization & manure
- From: G*@aol.com
- Date: Thu, 27 Jan 2000 18:29:58 EST
From: Gmbeasle@aol.com
In a message dated 01/26/2000 9:00:29 PM Eastern Standard Time,
ddbro@llano.net writes:
> This would be a classic example of the humiditure rule. When your
humidity +
> your temperatures meet or exceed 150 you are in the danger zone for rot.
At
> least this is what I have been told by several noted irisarians.
>
Humiture is an inexact attempt to quantify times when sweating is an
ineffective way for humans (and other mammals that sweat) to reduce their
core temperature. What is really important is the partial pressure of water
on the skin. The reason the humiture measure is ineffective is because the
warmer air gets the more water it can hold. So the partial pressure of water
on the skin (either promoting cooling by evaporation of sweat, or not) can
stay the same, and the relative humidity will go up and down depending on the
temperature.
You can apply it, and the wind chill factor to iris if you want to, but those
measures, however flawed, were not developed for plants.
> sidneygardener wrote:
>
> > In Albuquerque the only time I get rot is if I water too much in the
> summer
> > and the temperature kicks up.
Since I conceive that Albuquerque is probably very dry (??), this method of
promoting rot is probably more due to the high temperature of the water
droplets on the ground than to the humiture. Or if it is due to humiture,
it is an extremely localized phenomena - like within 2 inches of the plant.
IMHO and YMMV.
RosalieAnn the soon to be retired industrial hygienist south of Baltimore.
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