Quality of western Canadian canola 2016 - Chlorophyll content

Chlorophyll content

Chlorophyll content averages of producer samples graded Canola, No. 1 Canada were 10, 11 and 13 milligrams/kilogram in Manitoba, Saskatchewan and Alberta-British Columbia, respectively (Table 3).  The overall average for Canola, No. 1 Canada was 11 milligrams/kilogram, similar to what was observed for the 2015 harvest (12 milligrams/kilogram) (Figure 9).  This is slightly lower than the calculated 5 year average (14 milligrams/kilogram).  Individual producer samples of Canola, No. 1 Canada from Manitoba, Saskatchewan and Alberta-British Columbia had chlorophyll levels ranging from 4 to 27 milligrams/kilogram, 4 to 38 milligrams/kilogram and 4 to 41 milligrams/kilogram, respectively.  The mean chlorophyll content varies greatly from year to year (Figure 9) due to environmental conditions. Once again, location had an important effect on chlorophyll levels in the analyzed samples.  

Chlorophyll levels for Canola, No. 2 Canada samples averaged 23 milligrams/kilogram, much lower than what was observed for the 2015 harvest (31 milligrams/kilogram).  Samples graded Canola, No. 3 Canada showed an average chlorophyll content of 15 milligrams/kilogram, lower than what was observed in 2015 (45 milligrams/kilogram), confirming that the down grading from Canola, No. 2 Canada to Canola, No. 3 Canada was not due to seed immaturity.

Figure 9 Canola, No. 1 Canada - harvest samples, 2000 to 2016 - Chlorophyll content of the seed (milligrams/kilogram, as is moisture content)

Chlorophyll content of the seed.Details below

  • Details
    Chlorophyll content of the seed (milligrams/kilogram, as is moisture content), 2000 to 2016
    Year Chlorophyll content of the seed
    (milligrams/kilogram, as is moisture content)
    2016 Data
    2015 12.0
    2014 13.3
    2013 12.0
    2012 17.4
    2011 15.9
    2010 12.8
    2009 15.4
    2008 11.0
    2007 14.6
    2006 13.7
    2005 13.9
    2004 16.5
    2003 15.0
    2002 13.4
    2001 16.7
    2000 14.4

To be graded Canola, No. 1 Canada, samples must contain no more than 2.00% distinctly green seeds. Distinctly green seed averages were 0.57, 0.37 and 0.60% in Manitoba (0.56% in 2015), Saskatchewan (0.45% in 2015) and Alberta-British Columbia (0.57% in 2015) for Canola, No. 1 Canada samples, respectively. 

The chlorophyll content of Canadian canola exports is affected by distinctly green seeds and dockage content (no more than 2.5% for commercially clean exports).  Dockage averages for Canola, No. 1 Canada was 1.77 and 1.79% for commercially clean cargoes for December and August to December 2016 exports, respectively, whereas the dockage average for the non-commercially clean August to December 2016 exports was 2.72%.  Since August 1st, 2015, the distinctly green seed contents for individual cargoes of Canola, No. 1 Canada ranged from 0.2 to 0.8% and the chlorophyll content averages ranged from 10 to 17 milligrams/kilogram.  These chlorophyll content variations reflected the distinctly green seed variations within the exports (0.2 to 0.8%) and between harvest distinctly green averages (0.47%) and export distinctly green averages (0.43 to 0.5%); the higher distinctly green seeds content and the higher chlorophyll content in exports (Table 6).

It is expected that chlorophyll data for the 2016 to 2017 exports might be lower than chlorophyll average reported for the 2015 to 2016 shipping season. 

Table 3 Chlorophyll content - 2016 harvest - Canola quality data by grade and province
Number of samples Chlorophyll content, milligrams/kilogram
Mean Minimum Maximum
Canola, No. 1 Canada
Manitoba 417 10 4 27
Saskatchewan 806 11 4 38
Alberta-British ColumbiaFootnote1 604 13 4 41
Western CanadaFootnote2 1827 11 4 41
Canola, No. 2 Canada
Manitoba 12 18 8 33
Saskatchewan 15 22 10 54
Alberta-British ColumbiaFootnote1 24 25 5 49
Western CanadaFootnote2 51 23 5 54
Canola, No. 3 Canada
Western CanadaFootnote2 11 15 6 45
Canola, Sample Canada
Western CanadaFootnote2 26 17 4 51
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