[Market-farming] tracking soil temps
Road's End Farm
organic87 at frontiernet.net
Tue Jul 21 09:33:45 EDT 2009
On Jul 21, 2009, at 9:20 AM, Marcy Nameth wrote:
> The temps vary widely during the day and during cold spells and I was
> just thinking that it wouldn’t be very reliable to use when I read
> under corn to use the 9:00 a.m. soil temp.
> Johnny’s points out that it also makes a big difference if you’re
> using untreated (vs treated) seeds.
> My thermometer has a 5” probe and I put it all the way in. I’m sure
> depth makes a difference too and I may have been too deep. Does
> anyone else know?
>
I think you're supposed to use the temperature from about 4" down; but
am not sure. I am sure you don't use the surface temperature, though,
or go extremely deep ; just not sure whether it's supposed to be 3" or
4" or 5".
In addition to the treated/untreated seed differences, some varieties
are much more cold tolerant than others. Provider green bean, for
instance, will come up in quite cold soil, though slowly; but the
yellow beans I've tried need warm soil, over 60º (at 4" deep around 9
AM.)
-- Rivka; Finger Lakes NY, Zone 5 mostly
Fresh-market organic produce, small scale
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