Fig. 2 Nitrate N, and soluble and insoluble N in forage of timothy populations selected for high (N+) and low (N-) forage N concentration and of a check (champ). grown under limiting to nonlimiting N rates during the second regrowth cycle (Phase 2). In the first regrowth cycle (Phase 1), data were obtained under one N rate. Standard errors of the mean are presented as vertical bars

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