Abstract

Field experiment was carried out at the Agricultural Research
Centre in Dywania city at Iraq to study effect of nitrogen fertilizer and
plant populations on growth and yield and some components of corn with
the use of a experiment split plot with randomized complete block design
(R.C.B.D) with three replicated. Studied treatments were including three
levels of N fertilizers (0 , 100 and 200 kg ha-1) and three plant populations
(53333 Plant/ha , 66666 Plant/ha , 88888 Plant/ha ) . Observations were
made on total number of days up to 50% anthesis and silking , plants
height, leaf area , number of rows per ear , 500 – kernels weight, grain yield
per plant , total grain yield. All the parameters were significantly
influenced by fertilizer levels and plant populations .With every increased
level of N fertilizer and plant population , generally these characters
showed favorable response. it could be that giving plant 200 kg ha-1 as
nitrogen fertilizer and sowing as plant density an Plant/ha produced an
economical and stabile crop .