Quote:
Originally Posted by Nicolas Naranja
The ground will stay much warmer than the air. That being said, I use 14C (57) as base temperature for calculating bunch readiness. It is probably different for different varieties but generally once I hit 1000C growing degree days my bunches are close to ready. Down here a November bunch will be ready in April, while a June Bunch will be ready in September. Of course winters are far more variable temperature wise so I have to keep a closer eye on things than in the summer.
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Nicolas could you expand on that a bit?
And where are you measuring the temp?
As far as ground vs air I was under the impression that the ground temp will be warmer in the Winter BUT could be cooler in the Spring.
OK I may have answered my own questions.
I found this site
Heating & Cooling Degree Days - Free Worldwide Data Calculation
that has a plug in equation and gathers data from local weather stations. Only thing is that it computes heating and cooling degree days. I think that is just a terminology issue and the results should be the same. If I understand right you use 14C as the low and every hour above that is and 1 degree day. When you reach 1000C degree days the fruit are near ready.
If that is correct I have had 1611.7 degree days. Does that sound correct? If I understand this right that means I have had 1611.7 hours at or above 14C since June 1st, 2011.