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Two cultivars of rapeseed, Span (Brassica campestris, L.) and Zephyr (B. napus, L.) were inoculated at various intervals, beginning at 36 days after seeding, with Alternaria brassicae, A. raphani, or… (More)
Thirty-five plants of Agropyron trachycaulum from northern Canada were categorized as to the latitude of origin. Categories were 53–55, 55–58, 58–61, and 61–68° north latitude. In field plots at… (More)