Quality of western Canadian canola 2012
Chlorophyll content averages of producer samples graded Canola, No. 1 Canada were 15.9, 19.1 and 16.2 mg/kg in Manitoba, Saskatchewan and Alberta, respectively. The overall average for Canola, No. 1 Canada was 17.5 mg/kg, higher than the 15.9 mg/kg 12.6 mg/kg observed in 2011 and 2010, respectively. Individual producer samples of Canola, No. 1 Canada from Manitoba, Saskatchewan and Alberta had chlorophyll levels ranging from 4.0 to 43.0 mg/kg, 4.0 to 46.4 mg/kg and 4.0 to 54.9 mg/kg, respectively. The mean chlorophyll content of each western province varies greatly from year to year due to environmental conditions. Once again, location had an important effect on chlorophyll levels in samples. In 2012, compared to 2011, there was no severe frost reported in September. The dry conditions at harvest and the low moisture content the swathed seeds were likely responsible of the 2012 high chlorophyll averages.
Chlorophyll levels for Canola, No. 2 Canada samples averaged 34.5 mg/kg, slightly lower than what was observed in 2011 (37.0 mg/kg) but similar to the 2010 chlorophyll content (33.7 mg/kg). Samples graded Canola, No. 3 Canada showed an average chlorophyll content of 49.6 mg/kg much lower than the 72.3 mg/kg observed in 2011.
To be graded Canola, No. 1 Canada samples must contain no more than 2% distinctly green seeds. Distinctly green seeds averages were 0.78, 1.02 and 0.80% in Manitoba (0.67% in 2011), Saskatchewan (0.57% in 2011) and Alberta (0.59% in 2011) for Canola, No. 1 Canada samples, respectively.
The chlorophyll content of Canadian canola exports is affected by the distinctly green seeds and the dockage content - no more than 2.5% for commercially clean exports. The dockage averages for Canola, No. 1 Canada were 1.89 and 1.91% for commercially clean cargoes in November 2012 and from August to October 2012 exports (3.07 and 3.22% for the not commercially clean exports for the same preriods), respectively.
Since August 1st, 2012, the distinctly green seeds contents for the individual cargoes of Canola, No. 1 Canada ranged 0.6 to 1.8%. Up to now, the distinctly green seeds averaged 1.27% (November 2012) and 0.95% (August to October 2012) for the Canola, No. 1 Canada exports (Table 6). Chlorophyll content averages of the the Canola, No. 1 Canada exports ranged from 16.3 to 30.5 mg/kg, with the commcercially clean exports having a statistically lower chlorophyll content than the not commercially clean exports. Overall, in 2012, the chlorophyll content of the whole canola harvest averaged 21 mg/kg with a distinctly green seeds average of 1.3% These chlorophyll contents are higher than the 2012 chlorophyll content of Canola, No. 1 Canada 2011 because the distinctly green seeds averages are higher, moreover exports contain dockage whereas the tested harvest survey samples contain no doackage.
It is likely that the chlorophyll content of the Canola, No. 1 Canada shipments for 2012-2013 be similar to slightly lower than the chlorophyll content of the Canola, No. 1 Canada shipments for 2011-2012.
|Number of samples||Chlorophyll content mg/kg|
|Canola, No. 1 Canada|
|Western CanadaFootnote 2||1716||17.5||4.0||54.9|
|Canola, No. 2 Canada|
|Western CanadaFootnote 2||300||34.5||6.0||61.8|
|Canola, No. 3 Canada|
|Western CanadaFootnote 2||45||49.6||11.5||97.4|
|Canola, Sample Canada|
|Western CanadaFootnote 2||29||22.6||14.0||43.1|