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Grass Species and Cultivar Effects on Establishment of Grass–White Clover Mixtures

^a USDA-ARS Pasture Systems and Watershed Management Res. Lab., Bldg. 3702, Curtin Rd., University Park, PA 16802-3702 USA

View larger version (29K): [in a new window]   Fig. 1 Percentage of white clover in clipped herbage from grass–clover mixtures grown in the greenhouse. Data are averages of two clipping heights, two clipping frequencies (regrowth harvest only), and two runs each of five replicates. PRG, perennial ryegrass; OG, orchardgrass. Bastion and Dawn are early maturity; Rosalin and Pennlate are later maturity. *,** Significant at P < 0.05 and 0.01, respectively

View larger version (37K): [in a new window]   Fig. 2 Herbage dry matter yields and percentage clover in grass–white clover mixtures and monocultures at two harvest dates in the field. Data are averages of two cutting heights and five replicates. Btn, Bastion perennial ryegrass (early maturity); Ros, Rosalin perennial ryegrass (late maturity); Dwn, Dawn orchardgrass (early maturity); Pnn, Pennlate orchardgrass (late maturity); Will, white clover