Re: CULT:Watering Twice a Day

In a message dated 8/14/2002 7:07:42 PM Central Daylight Time, 
donald@eastland.net writes:


> (Wondering why sprinkling with overhead
> >sprinklers causes more rot than rainfall).
> 
> I can't tell that does make a difference.  I'm just as apt to have rot,
> maybe more so, after rain at the wrong time than I am to cause it by
> overhead watering.  I get the most rot without either - the ground is dry,
> dry, dry and the rot still appears.  It's there and I'm dealing with it,
> then get the rain.  In that situation, the rain does seem to exacerbate the
> situation.  As would watering by any method, I think. 

Assuming for a moment that overhead watering causes more rot than rain.
There is at least one difference between the two that bares some 
consideration. During periods of rain solar radiation/light levels are 
reduced by cloud cover. It may be that reduction in production of essential 
plant chemicals, chlorophyl, etc., have some baring on the results.

Or, going back to a previous post, e.g., transpiration function of leaves may 
have a baring here. While I do not know how pores react with changes in light 
levels it seems plausible that when they sense lower light levels they might 
open in anticipation of arriving moisture and open that end of the pipe line 
to start pumping. When watering overhead the plant has received no signal to 
open the pores hence a moisture imbalance between the plants needs and what 
it possesses is created beyond its ability to rectify.

If one were comparing this situation to an electrical circuit, the water 
would be the electrical current, the plant would be a capacitor. The 
applicable electrical law states the current (water) cannot instantaneously 
change when flowing through a capacitor (plant).

Speculating with no basis in experience or fact,

Bill Burleson 7a/b
Old South Iris Society




[Non-text portions of this message have been removed]


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