Fig. 4. Residual soil NO₃–N in orchardgrass and smooth bromegrass at 224, 448, and 672 kg N ha^-1 yr^-1 from the 0- to 0.3- and 0.3- to 0.6-m soil depths at four harvests in 1999 and 2000, near Pittstown, NJ. Harvest 4 corresponds to sampling after a killing frost. Vertical bars identify LSD to separate soil depth means for the same N rate, species, harvest, and year at the 0.05 significance level.