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.

Simple

Date ( RI_367 )
2017-05-08
Date ( RI_366 )
2017-05-08
RI_414
  Government of Canada; Agriculture and Agri-Food Canada; Science and Technology Branch
Canada
https://agriculture.canada.ca
RI_412
  Government of Canada; Agriculture and Agri-Food Canada; Science and Technology Branch
Canada
https://agriculture.canada.ca/
Presentation form
mapDigital;carteNumérique RI_391
Status
completed; complété RI_593
Maintenance and update frequency
asNeeded; auBesoin RI_540
Keywords ( RI_529 )
  • agclimate
  • CH
Government of Canada Core Subject Thesaurus Thésaurus des sujets de base du gouvernement du Canada ( RI_528 )
  • Temperature
  • Farmlands
  • Agriculture
  • Crops
  • Precipitation
Use limitation
Open Government Licence - Canada (http://open.canada.ca/en/open-government-licence-canada)
Access constraints
license; licence RI_606
Use constraints
license; licence RI_606
Spatial representation type
vector; vecteur RI_635
Spatial representation type
grid; grille RI_636
Metadata language
zxx; CAN
Topic category
  • Climatology, meteorology, atmosphere
Begin date
2012-09-03
N
S
E
W
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Reference system identifier
http://www.epsg.org/ / EPSG:3857 / 8.3.4
RI_414
  Government of Canada; Agriculture and Agri-Food Canada; Science and Technology Branch
Canada
https://agriculture.canada.ca
OnLine resource
Data Product Specification (English) ( HTTPS )

Supporting Document;PDF;eng

OnLine resource
Crop (Corn) Heat Units ( HTTPS )

Web Service;WMS;zxx

OnLine resource
Using AAFC Climate Services (French) ( HTTPS )

Supporting Document;PDF;fra

OnLine resource
Data Product Specification (French) ( HTTPS )

Supporting Document;PDF;fra

OnLine resource
Agroclimate Interactive Maps (English) ( HTTPS )

Application;HTML;eng

OnLine resource
Agroclimate Interactive Maps (French) ( HTTPS )

Application;HTML;fra

OnLine resource
Crop (corn) heat units ( ESRI REST: Image Service )

Web Service;ESRI REST;zxx

OnLine resource
Pre-packaged GeoTIF files (No linguistic component) ( HTTPS )

Dataset;GeoTIF;zxx

OnLine resource
Using AAFC Climate Services (English) ( HTTPS )

Supporting Document;PDF;eng

OnLine resource
Crop (Corn) Heat Units ( ESRI REST: Image Service )

Web Service;ESRI REST;zxx

File identifier
07875f11-c342-4450-bdaa-0cdeaf43c0c9 XML
Metadata language
eng; CAN
Character set
utf8; utf8 RI_458
Hierarchy level
series; série RI_623
Date stamp
2024-08-12T12:47:40
Metadata standard name
North American Profile of ISO 19115:2003 - Geographic information - Metadata
Metadata standard version
CAN/CGSB-171.100-2009
RI_414
  Government of Canada; Agriculture and Agri-Food Canada; Science and Technology Branch
Canada
https://agriculture.canada.ca
 
 

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