IMPROVING YIELD AND YIELD QUALITY OF FOUR FABA BEAN CULTIVARS GROWN UNDER RAINFALLS

Four experiments were carried out at the research field of horticulture Dept, Agriculture & Forestry college, Mosul University, during 2004-2005 growing season to investigate the ability of boosting drought resistance in four faba bean cultivars by foliar spraying of Fe-ethylene diamine-di-o-hydroxy phenyl acetic acid ( Fe-EDDHA ) at rates of 0,50,100 and 150 mg. L ̅1; boric acid ( H3BO3 ) at rates of 0, 50, 100, 150 and 200 mg.L ̅1; potassium iodide (KI) at rates of 0, 25, 50, and 75 mg.L ̅1, phtoFert. at rates of 0, 1, 2 and 3g.L ̅1 at the commence of flowering and was repeated after 2 weeks. Experiment 1 results showed that spraying local Syrian cultivar with 100 mg. L ̅1 FeEDDHA appeared to be the most effective treatment. It significantly increased the yield of dry seeds (19.7%), in relation to its corresponding checks. In experiment 2 , the application of 50 mg.L ̅1 H3BO3 was the paramount treatment. It exceeded the yield of dry seed of untreated treatment by 28.4%. Experiment 3 results revealed that potassium iodide rates resulted in adverse effects on all detected parameters favorable for aqueduce cultivar growth and yield. Consequently, negative correlation were found in most growth, flowering, pod development, seed fillings and yield component parameters . Experiment 4 results manifested dramatic negative correlations caused by foliar spray of phytoFert rates in most favorable traits for the improvement of plant growth and yield. The worst treatment was 3g.L ̅