Fig. 4. Relative abundance of ureides in petiole tissues during (A) 1995 and (B) 1996 at Fayetteville, AR. Treatments were the following: control, no N fertilizer applied; V6, 112 kg N ha^–1 at V6; R2, 112 kg N ha^–1 at R2; V6&R2, 112 kg N ha^–1 at both V6 and at R2. At each measurement date, LSD values (0.05) are shown. Values were averaged across irrigation treatments in both years (irrigation and N-treatment interaction was nonsignificant).