THE EFFECT OF IRON, NITROGEN AND IRRIGATION ON YIELD OF FLAX (linum usitatissimum L. )

Abstract

A field experiment of flaxseed was carried out during the growing seasonof 2011-2012 at agriculture field Mosul University in clay soil. Theexperimental design was split-split plot design with using the RCBD with threereplicates. Irrigation treatments occupied the main plot (Rainfall and integralirrigation). Nitrogen fertilizer (0, 100, 200)Kg N/h occupied the subplots, whilethe iron treatments (0. 5, 1, 1. 5)% Fe occupied the sub-sub plots. The resultsshowed increasing nitrogen fertilizer levels to 200kg N/h significantly increasedin all characters except oil percentage decreased with increase levels ofnitrogen. Iron fertilizer gave at 1. 5% Fe significantly increased in numbercapsules / plants and seed yield/ plant and seed yield / h, while 1% Fe gavesignificantly increased of percentage of oil in seed and oil yield/ h. integralirrigation gave significantly increase the number capsules / plant, seed yield /h,oil percentage and oil yield/h. The second order interactions between differentfactors show significantly differences in the studied characters. Concluded ofthis study of the flax crop sensitive to water stress and need to provide humiditycontaining ready for absorption from soil, also it is response highly effect tonitrogen and iron fertilizer in increase seed yield and oil.