Haku
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Cadmium contents of oats (Avena sativa L.) in official variety, organic cultivation, and nitrogen fertilization trials during 1997-1999
(American Chemical Society, 2003)
Contribution of new varieties to cereal yields in Finland between 1973 and 2003
(Cambridge University Press, 2004)
Grain number dominates grain weight in temperate cereal yield determination : evidence based on 30 years of multi-location trials
(Elsevier Science Publishers B.V., 2007)