Crop (corn) heat units
Crop Heat Units (CHU) are calculated on a daily basis, using the maximum and minimum temperatures in order to account for a crop’s negative response to higher temperatures.
The formula used to calculate the CHU value for a day is:
(1.8 × (Minimum Temperature − 4.4) + 3.33 × (Maximum Temperature − 10) − 0.084 × (Maximum Temperature − 10)²) ÷ 2.0
CHU values are only accumulated during the Growing Season, April 1 through October 31.
- Publisher - Current Organization Name: Agriculture and Agri-Food Canada
- Licence: Open Government Licence - Canada
Data and Resources
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Data Product Specification (English)PDFEnglish guide PDF
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Crop (Corn) Heat UnitsWMSNo linguistic content; Not applicable web_service WMS
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Using AAFC Climate Services (French)PDFFrench guide PDF
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Data Product Specification (French)PDFFrench guide PDF
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Agroclimate Interactive Maps (English)HTMLEnglish application HTML
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Agroclimate Interactive Maps (French)HTMLFrench application HTML
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Crop (corn) heat unitsESRI RESTNo linguistic content; Not applicable web_service ESRI REST
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Pre-packaged GeoTIF files (No linguistic component)GeoTIFNo linguistic content; Not applicable dataset GeoTIF
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Using AAFC Climate Services (English)PDFEnglish guide PDF
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Crop (Corn) Heat UnitsESRI RESTNo linguistic content; Not applicable web_service ESRI REST
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