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Effects of Early Season Nitrogen on Grass–Clover Swards in the Northeastern USA

USDA-ARS, Pasture Syst. and Watershed Manage. Res. Lab., Curtin Road, Building 3702, University Park, PA 16802-3702

View larger version (35K): [in a new window]   Fig. 1. Monthly N concentrations in grass and clover fractions of orchardgrass–white clover swards fertilized with four rates of N and harvested at three target sward harvest heights (TSHH). Vertical bars indicate standard error of the mean.

View larger version (29K): [in a new window]   Fig. 2. Monthly clover fraction of orchardgrass–white clover swards fertilized with four rates of N and harvested at three target sward harvest heights (TSHH). Vertical bars indicate standard error of the mean.