Re: Nitrogen level by observing the leaves

In a message dated 12/6/99 2:21:45 PM Eastern Standard Time, cmicha@chmc.org 
writes:

<< Subj:     RE: Nitrogen level by observing the leaves
 Date:  12/6/99 2:21:45 PM Eastern Standard Time
 From:  cmicha@chmc.org (Michalec, Chris)
 Sender:    owner-pumpkins@mallorn.com
 Reply-to:  pumpkins@mallorn.com
 To:    pumpkins@mallorn.com ('pumpkins@mallorn.com')
 
 
 George,
 I'm not too sure about that temperature requirement of 80º.  If we 
 had to go by that here in the Northwest this year, we only would
 have had a handful of opportunities to check our nitrogen levels.
 Cooler temps in our growing region were the rule rather than the
 exception this past season.  Overall weights were down this year.
 Some growers were still able to produce some pretty decent fruit.
 I don't know how much that had to do with chlorophyll production,
 lack of direct sunlight, cooler soil temperatures restricting the 
 uptake of nutrients, or whatever.  I believe it was Beth who posted
 the comment of finding green cotyledon leaves from seeds that had
 germinated inside the pumpkin,  I have noticed this myself, even inside
 the thick walls of an AG.  I can't imagine that much light had penetrated
 inside the pumpkin, and this occurred late in the year when outside 
 temperatures were quite cool.  So some chlorophyll production does
 occur even in the dark and in temperatures below 60º.  These plants 
 never fail to amaze me.
 
 Chris Michalec
 Covington, WA
 
  >>
Hard to say what is going on for sure.  Because I start my Pumpkins very 
early I have observed the following.  I will watch the plants color which in 
the spring is lighter than normal with temps below 78 or so.  We will get 
temps above 80 for a few days at a time and the color darkens up.  Even at 
the low temps there is good green color but not the deep green I see in warm 
weather.  I know Phosphorus take up is lowered in cool weather or low soil 
temps.  Does anyone else have some info on this?

Thanks
George Brooks

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