Fig. 3. Effects of inorganic fertilizer treatments on percent foliar N. Error bars represent standard error (n = 18). Dashed vertical lines represent dates of compost topdressing applications. Means are averaged across compost topdressing treatments. Nitrogen fertilizer applied in 1997 for the low (LR), moderate (MR), and high (HR) rate treatments were 96, 192, and 394 kg N ha-1, respectively. N fertilizer applied in 1998 and 1999 for the LR, MR and HR treatments were 48, 96, and 192 kg N ha-1, respectively. Significant inorganic fertilizer x compost topdressing interactions were observed only on 25% of the rating dates over the 3-yr study, and all of these occurred within 50 d after the May topdressing applications
