Posted to sci.med.nutrition,rec.food.cooking
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Oh, but I'm sure canola is perfectly safe.
http://www.flaxcouncil.ca/english/in...ng1&mp=growing
> Crop Rotation
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> Following Canola or Mustard
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> Research in Saskatchewan has shown that flax sometimes does poorly after canola or mustard. This is due to toxic compounds in mature canola and mustard plants and their seedling residues. However, research in Manitoba has shown that flax yields on canola stubble were generally not affected, although small reductions occurred in some years. The problem is most evident where straw and trash from the previous canola crop have not been adequately spread on the soil surface. Canola straw should, therefore, be spread uniformly, and spring volunteer seedlings should be controlled at an early stage in order to minimize possible toxic effects. Seeding into untilled canola stubble can also minimize the problem.
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