A field trial was conducted to evaluate the effect of three nitrogen levels (N1@ 150 kg ha-1,
N2@ 200 kg ha-1, N3@ 250 kg ha-1) and three maize cultivars B-202, M-919 and P-31-R-
88 on yield and yield components of maize. Nitrogen rates significantly affected harvest
index (HI). The maximum HI (41.97%) was achieved in N3 treatment followed by N2
(41.20%) and N1 (38.01%). Maximum grain yield (8.09 t ha-1) was produced@ 250 kg N ha-
1 followed by N2 (7.57 t ha-1) and N1 (6.59 t ha-1) treatments. Cultivar P-31-R-88 also …

A field trial was conducted during 2005 in Faisalabad, Pakistan, to evaluate the effect of
three nitrogen levels (N1 at 150, N2 at 200 and N3 at 250 kg ha-1) and three cultivars (B-
202, M-919 and P-31-R-88) on the yield and yield components of maize. The nitrogen rates
significantly affected the harvest index (HI). The maximum HI (41.97%) was achieved in N3
treatment, followed by N2 (41.20%) and N1 (38.01%). The highest grain yield (8.09 t ha-1)
was recorded with N3, followed by N2 (7.57 t ha-1) and N1 (6.59 t ha-1) treatments. P-31-R …