Quality of western Canadian canola 2013

Chlorophyll content

Chlorophyll content averages of producer samples that graded Canola, No. 1 Canada were 11.1, 11.4 and 14.1 mg/kg in Manitoba, Saskatchewan and Alberta, respectively (Table 3c). The overall average for Canola, No. 1 Canada was 12.0 mg/kg, significantly lower than 17.5 mg/kg and 15.9 mg/kg observed in 2012 and 2011, respectively (Table 3c, Figure 9). Individual producer samples of Canola, No. 1 Canada had chlorophyll levels ranging from 4.0 to 32.5 mg/kg (Manitoba), 4.0 to 41.3 mg/kg (Saskatchewan) and 4.0 to 44.1 mg/kg (Alberta) (Table 3c). The mean chlorophyll content of each western province varies greatly from year to year (Figure 9) due to environmental conditions. Once again, location had an important effect on chlorophyll levels in samples (Tables 7, 8 and 9). In 2013, compared to 2012, September was warmer than normal (Figure 2), and no frost was observed in September in most of the prairies, allowing the maturation of swathed canola.

Chlorophyll levels (Table 3c) for Canola, No. 2 Canada samples averaged 26.6 mg/kg, lower than what was observed in 2012 (34.5 mg/kg). Samples that graded Canola, No. 3 Canada had an average chlorophyll content of 25.0 mg/kg , which was much lower than 49.6 mg/kg, the average observed in 2012.

To be graded Canola, No. 1 Canada samples must contain no more than 2% distinctly green seed. Distinctly green seed averages were, 0.44% in Manitoba (0.78% in 2012); 0.38% in Saskatchewan (1.02% in 2012); and 0.51% in Alberta (0.80% in 2012) for Canola, No. 1 Canada samples.

The chlorophyll content of Canadian canola exports is affected by distinctly green seed and dockage content, which must be no more than 2.5% for commercially clean exports. Dockage averages for Canola, No. 1 Canada were 1.93% for commercially clean cargoes for exports from August to November 2013 and 2.92% for the not-commercially clean exports from August to October 2013.

Since August 1, 2013, distinctly green seed content for individual cargoes of Canola, No. 1 Canada ranged from 0.3 to 1.3%. Chlorophyll content averages of Canola, No. 1 Canada exports ranged from 9 to 24 mg/kg, with commercially clean exports having similar chlorophyll content than the not commercially clean exports (Table 6).

Chlorophyll content in the 2013 export data is lower than the 2012 chlorophyll content for Canola, No. 1 Canada. Distinctly green seed averages are higher for the export shipments than for harvest samples (Table 6). As exports also contain dockage (harvest survey samples contain no dockage), it is expected that chlorophyll content in the export data will be higher than in harvest data. It is also expected that the chlorophyll content in the export data will be lower than what was observed in 2012.

Table 3c - Chlorophyll content – 2013 Harvest survey
Canola quality data by grade and province
  Number of samples Chlorophyll content mg/kg
Mean Minimum Maximum
Canola, No. 1 Canada
Manitoba 321 11.1 4.0 32.5
Saskatchewan 757 11.4 4.0 41.3
AlbertaFootnote 1 491 14.1 4.0 44.1
Western CanadaFootnote 2 1569 12.0 4.0 44.1
Canola, No. 2 Canada
Manitoba 17 17.5 4.0 32.6
Saskatchewan 7 27.3 6.0 58.4
AlbertaFootnote 1 42 30.2 6.0 69.2
Western CanadaFootnote 2 66 26.6 4.0 69.2
Canola, No. 3 Canada
Western CanadaFootnote 2 22 25.0 4.0 63.1
Canola, Sample Canada
Western CanadaFootnote 2 19 14.7 6.0 31.5

Footnotes

Footnote 1

Includes part of the Peace River area that is in British Columbia

Return to first footnote 1 referrer

Footnote 2

Values are weighted averages based on production by province as estimated by Statistics Canada

Return to first footnote 2 referrer

Figure 9 - Chlorophyll content of harvest survey samples, 1980-2013 - Canola, No. 1 Canada
Graph of canola chlorophyll content from samples 1980-2013. Details in table below.
Table: Chlorophyll content of harvest survey samples, 1980-2013 - Canola, No. 1 Canada
Year Chlorophyll mg/kg
1980 16.0
1981 16.0
1982 9.0
1983 11.0
1984 9.0
1985 12.0
1986 15.0
1987 10.0
1988 12.0
1989 10.0
1990 9.0
1991 10.0
1992 14.0
1993 16.0
1994 11.0
1995 14.0
1996 15.0
1997 11.0
1998 13.0
1999 15.0
2000 14.4
2001 16.7
2002 13.4
2003 15.0
2004 16.5
2005 13.9
2006 13.7
2007 14.6
2008 11.0
2009 15.4
2010 12.8
2011 15.9
2012 17.4
2013 12.0