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The top documents tagged [identification of varieties]
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identification of varieties
Cyclopedia of Hardy Fruits; by U. P. Hedrick (1922)
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PATHOGEN VARIABILITY All pathogens exist as populations of individuals, not unlike the people in this room, this city, etc. They, like people, share many.
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PATHOGEN VARIABILITY
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International Rice Research Notes Vol.26 No.1
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