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Figure 1. Mean biomass of seeded species, cultivated species biomass (seeded species plus cultivated weeds), and total biomass (cultivated species plus wild weeds) by seeded species richness and log-linear regression lines as a function of seeded species richness in two Iowa locations under two harvest managements averaged over 2 yr: (A) Boone–one harvest; (B) Boone–three harvests; (C) Ames–one harvest; and (D) Ames–three harvests. All linear regressions are significant at P < 0.0001.
