Abstract

A Field experiment was carried out on the right bank of the Euphrats river north west of the Ramadi city in Anbar Province in a farmers field (Al-Dawwar area) during the winter season 2013-2014 . Use RCBD design with split-plot arrangement with three replications. The objective of this study was to know the effect of plant densities on the growth and yield of wheat cultivares to determine the best cultivares suitable to the environment of the experiment .Used four cultivares (Dor-29 , Dor-85 , Baghdad-2 , and Wahat Al-Iraq ) in (Main-plots) , and plant densities (100 , 120 ,140 , 160 Kg.ha-1) in (sub-plots)Results of the study were summarized as follows: Plants of varieties which planted of different densities shows significant differences , which low plant density( 100kg.ha-1 )gave higher 1000 kernel weight (47.33 g), number of grains (44.25 grain . spike-1),grain yield (7.20 to.ha-1) and the largest value of harvest index (51.24%)while the higher plant density( 160 kg.ha-1 ),significant in the characteristics of number of spikes (395.92 spike . m-2).The result showed a significant difference between varieties that is Baghdad-2 cultivar superior in number of spikes (379.52 spike.m-2),grain yield (6.04 to.ha-1) and harvest index (40.58%).Wahat Al-Iraq was superior significantly in 1000 grain weight (45.25 g). While Dor-29 cultivar superior in number of grain (38.00 grain . spike-1).and there was is a significant interaction between cultivars and plant densities