The study was conducted at experimental ields of the Krishi Vigyan Kendra, Kapurthala. The experiment
was laid out in a 6 strip plots with plot size of 48 m2 including 2 hybrids (PMH 1 and DKC 9125) at 3 plant
population densities comprising of 55,555, 83,333 and 1,11,111 plants/ha with the objective of observing
the efect of plant spacing on yield attributes and yield of maize hybrids. The yield
... [Show full abstract] attributing factors as
number of rows per cob, number of grains per row, cob girth and cob length were determined and inally
the yield was recorded for both the hybrids. In case of DKC 9125 the only factor contributing to increase
in cob yield and grain yield per unit area was the number of plants grown in the area, so the maximum yield
was obtained at 15 cm plant spacing whereas, in case of PMH 1, both yield attributing factors (cob length
and plant spacing) ultimately led to increase in grain yield. At 20 cm plant spacing the number of plants
were reduced but increase in cob length at wider plant spacing nulliied the efect of lesser plants grown per
unit area. It was due to the reason that increase in cob length did not occur proportionately to the reduction
in plant population. Hence, PMH 1 hybrid gave maximum cob yield and grain yield at 20 cm plant spacing.