Dan -
I spent some time tonight trying to answer your question - and all I learned is "I don't know". It seems CHU is terminology used in Canada, especially Ontario, for corn/crop production - Though it does not seem to be well used here - at least not in New York State. Below is the map you probably use for CHU in Ontario:
In New York - there is alot more information for Corn in terms of GDD (Growing Degree Days). Here is a link:
http://www.entomology.cornell.edu/Ex...odys/nyGDD.gif
Maybe there is a correlation from CHU to GDD - I'm not sure - probably you know though.
We are between Utica and Syracuse - but a little higher elevation - I'd guess our GDD to be around 1800 units this year. It would seem that we are 100-200 units behind our 5 year average - as is all of the Northeast.
I checked the corn this past weekend - and some is just now starting to dent - but most is still late dough stage. We came real close to our 1st frost last night (36degrees) - We could get one any time now and we'd be OK on our corn drying properly - but I see a lot of farmers corn - that would be a total loss for grain - if we had a hard frost now.
We used 85 day RR corn, and it seemed to be just about right - though it took longer to get there this year. For us, less days is almost always better as we usually have our first frost by 9/20 and we are lucky to get it planted by June 1. We've had 105 day corn freeze out before denting in the past - and what a bummer that is.
How did your corn/crops fare this year??
-Sean