Scientists have found that different soil moisture conditions in different cotton growth stages affect vegetative growth, reproductive development, qualitative and quantitative yield, yield components, boll abscission, maturity and physiological process such as photosynthesis, respiration, assimilate translocation and partitioning and so on. To evaluate effect of irrigation regimes and foliar feeding of micronutrients on some morphological characteristics of cotton plants and cottonseed traits, this experiment was conducted at Agricultural Research Station owned by Islamic Azad University, Khorasgan Branch in a split plot layout with three replications in 2009. Irrigation treatments were regarded as the main factors and foliar application of micronutrients was applied as sub-factors. Plant height, main stem's node number, number of monopodial and sympodial branches, weight of 100 seeds, cottonseed yield, seed oil and protein percentage and oil yield were calculated and analysis of variance was carried out for all traits on split plot layout based on randomized complete block design. According to the results, effect of irrigation regimes was statistically significant on morphological characteristics at 1% probability level. Foliar feeding of micronutrients had no significant effect just on number of monopodial branches, although, interaction of irrigation regimes and foliar feeding of micronutrients had significant effect just on plant height. Effect of irrigation regimes and foliar feeding of micronutrients on related traits to seed was significant at 1% probability level as well. The greatest 100-seed weight (10.88 g) and seed oil percentage (28.03) were related to irrigation after 80 mm evaporation with three times foliar feeding of micronutrient treatments. Also, the highest amount of oil yield (163.78 kg/ha) was produced in irrigation after 160 mm evaporation with three times foliar feeding of micronutrient treatments.
