Canadian Stocks of principal field crops at March 31, 2011As of March 31, total stocks of canola and barley fell significantly compared with the same date in 2010. By contrast, total stocks of corn for grain rose slightly above March 2010 levels, the result of increased production in 2010.Total stocks of canola were 4.9 million metric tonnes, down 22.8 % or 1.4 million metric tonnes from March 31