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Fig. 1 Mean maize grain yield (0% moisture) in Ontario from 1892 to 1997, from Agriculture Statistics for Ontario, Ontario Ministry of Agriculture, Food and Rural Affairs, Queen's Printer of Ontario, Toronto, ON, Canada





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HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
The SCI Journals Agronomy Journal Vadose Zone Journal
Journal of Natural Resources
and Life Sciences Education		 Soil Science Society of America Journal
Journal of Plant Registrations Journal of
Environmental Quality		 The Plant Genome