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Growing Degree Days Winter Wheat Development 2024

Location Growing Degree Day accumulation as of january 1st 2024 GDD accumulation last year 
Harrow 72 83
Ridgetown 72 74
London 49 43
Sarnia 68 77

Updated Feb 25, 2024   Weather station data is always calibrated, verified and adjustments  made to recorded temps which is why measurements  can change slightly over time. 

Growing Degree Days (GDD)  is a thermal, time measurement that allows us to track the intervening time between critical growth stages. GDD is calculated by taking the average of the high and low temperature in C for each day with a base temperature of 0 C. ( temperatures calculated  below 0 do not count) 

We will  track GDD accumulation  beginning in January throughout the season. Green up usually begins after an accumulation of 250 -300 GDD. (Usually by Mid April) Green up is when we assess plant stands and consider our nitrogen application strategy based on plants per foot of row, number of tillers and decide on a single or split application of nitrogen. 

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