EFFECT OF DIFFERENT LEVELS OF NITROGEN FERTILIZER AND ROW SPACING ON THE GROWTH AND YIELD PRODUCTION OF FLAX IN NORTH IRAQ

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.