Abstract
The experiment was conducted out during the years of 2007 -2008 and 2008 -2009 at the college farm of Basic Education - Mosul University. The purpose of the experiment was to study the effect of four nitrogen fertilizer levels ( 0 , 30 , 60 and 90 kg N .ha-1) and three row spacing ( 15 , 25 and 35 cm between rows) on yield and yield components of flax. Randomized complete block design ( R.C.B.D ) with three replication was used. The result showed a clear evidence increase in the following characteristics: no. of siligua / plant , no. of seeds / siliqua , wt .of 1000 seeds , Seed and oil yield by using nitrogen fertilizer at the levels 60 kg N .ha-1, whereas no. of fruiting branches / plant and no.of siliqua / plant increased significantly when nitrogen fertilizer added at the level 90 kg N .ha-1.The wt .of 1000 seeds , seed and oil yield were highly increased when flax plants sown at row spacing of 15 cm , but no. of fruiting branches / plant, no. of siligua / plant and no. of seeds / siliqua were increased at row spacing of 35 cm. seeds and oil yield increased significantly when the plant growing at 15 and 25 cm row spacing with 60 kg N .ha-1. The interaction season (2008 -2009) ×row spacing( 15 cm ) × nitrogen fertilizer( 60 kg N .ha-1) gave a highly significant increased in seed yield (1590 kg .ha-1). While oil yield gave a higher ( 612 kg .ha-1) at interaction season( 2007 -2008 ) ×row spacing( 15 cm ) × nitrogen fertilizer( 60 kg N .ha-1) The estimated correlation coefficients (r) were positively and significant correlated between no. of seed capsule with each of seed and oil yield.
