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  • From: Bill Shoemaker <wshoemak AT illinois.edu>
  • To: "Market Farming" <market-farming AT lists.ibiblio.org>
  • Subject: Re: [Market-farming] peppers
  • Date: Sat, 11 Sep 2010 19:53:08 -0500 (CDT)

It really depends on where you set the probe. If you're measuring the top 1",
it'll really rise during the day, and drop at night. I've found over time
that measuring at 4" deep is a better reflection of soil temps on the root
system, and the plant. It'll still fluctuate, but not nearly as much. It's
also the standard used in most ag research unless there is something critical
about the shallow soil conditions. Keep in mind that moisture fluctuates a
lot in that shallow range too, so roots tend to be a little deeper, unless
mulch moderates moisture levels in the shallow range.

I suspect you're right though. In shallow depths we must have been really hot
at times, particularly mid-afternoon. I hope we have a more normal season
next year.

Bill

---- Original message ----
>Date: Fri, 10 Sep 2010 21:50:51 -0500
>From: Shawnee Flowerfarmer <farmingflowers AT hotmail.com>
>Subject: Re: [Market-farming] peppers
>To: <market-farming AT lists.ibiblio.org>
>
> Bill, re soil temperatures.....I've been using my
> soil thermometer constantly and often have soil
> temperatures above 100 degrees in North Central
> Illinois. Last weekend, at 2 pm, the thermometer
> registered 98 degrees in the kohlrabi patch on straw
> mulched ground and 83 degrees in the shade between
> cabbage plants. At this point, I'm not drawing
> conclusions, just recording the observations.
> (Although I do plant by soil temperatures in the
> spring.)
> Shawnee, zone 5, weather geek
>
> > From: wshoemak AT illinois.edu
> > To: market-farming AT lists.ibiblio.org
> > Date: Fri, 10 Sep 2010 06:33:58 -0500
> > Subject: Re: [Market-farming] peppers
> >
> > We have had a great pepper crop in northern
> Illinois, despite more than double the normal
> rainfall during June and July. We didn't have 85F
> soil temps. We never do. We planted on black plastic
> mulch.
> > I
> >
> >
> >
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> > William H Shoemaker, UI-Crop Sciences
> > Sr Research Specialist, Food Crops
> > St Charles Horticulture Research Center
> > 535 Randall Road St Charles, IL 60174
> > 630-584-7254; FAX-584-4610
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William H Shoemaker, UI-Crop Sciences
Sr Research Specialist, Food Crops
St Charles Horticulture Research Center
535 Randall Road St Charles, IL 60174
630-584-7254; FAX-584-4610




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