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Total ergot alkaloids in the urine of Angus steers before pasture placement (day 0) and after 1, 2, 14, and 28 days of grazing on either nontoxic (Max-Q; n = 6) or toxic (E+; n = 6) endophyte-infected tall fescue. Data are presented as ng/mg creatinine. An asterisk indicates significant difference between treatment groups on a sampling date (P < 0.05).
