warm vs cold water
- To: pumpkins@mallorn.com
- Subject: warm vs cold water
- From: D* S*
- Date: Fri, 16 Apr 1999 14:07:50 -0700
I have heard people say that warm water is better than cold water for use
on pumpkin plants, but I thought I might reopen that debate.
If the issue is that roots absorb warm water faster, or take in more of it,
I see an inconcistency... 100 gallons of water occupies about 12 cubic
feet, and an aggressive waterer might dump that much at once on a 1000
square foot patch. The soil will win, thermally speaking. By the time the
(100F) water has invaded the top 1", meaning ~100 cubic feet of (70F) soil,
it will be very near ambient soil temperature (73F), and as close to
ambient as makes no difference by the time it reaches all the roots within
8" of the surface. (The numbers reflect some assumptions, but the real
picture will be similar - there is just alot of soil).
If we are talking about foliar application, that might be a different
story. Is there any plant physiology to support a benefit from warm water?
Dan Shapiro
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