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This study was carried out during 2008 growing season on peach trees (Prunus persica L.) cv. Early Coronet selected from orchard in Seiujh Duhok city Kurdistan Region, Iraq, to investigate the effect of [Naphthalene acetic acid [NAA, Riedel-de Haen (0 and 5 mg.l); KNO3 (Merck) (0, 0.1 and 0.2 %), and Fe (NaFeEDDHA) Technical Sodium Ferric ethylenediamine di-o-hydroxyphenyle acetate (0, 30 and 60 mg.l] on growth and fruit characteristics. One month after fruit set, trees were sprayed at two date (24/April/2008 and 25/May/2008) with NAA, KNO3 and Fe. Raising the levels of NAA to 5 mg.l, KNO3 to 0.2 % and Fe to 60 mg.l led to a significant increase in the value of shoot dry weight, total chlorophyll, fruit number, fruit length, fruit diameter, total carotene as compared with untreated trees. The interaction between Foliar spray of 5 mg.l NAA  0.2% KNO3  60 mg.l Fe were the best treatment which gave the highest means of shoot dry weight, total chlorophyll, fruit number, fruit length, fruit diameter and total carotene. INTRODUCTION The peach Prunus persica is known as a species of prunus that bear an edible juicy fruit. It is belonging to the subfamily Prunoideae of the family “Rosaceae” (Grisez et al., 2000). Peach is one of the most important stone fruit, due to its heavy loading and dietetic value, the fruit is a good source of carbohydrate, protein and vitamins especially (A, B and C) and mineral nutrient such as phosphorus, potassium, calcium and iron. Beside the different uses of the fruit, it is often used as table fruits (fresh fruit), juice and jams (Bal, 2005). Today, peaches are the third largest commercial fruit in Iraqi Kurdistan Region, after grapes and apples. Increasing yield of fruit trees are the result of improved cultivars, cultural practices and pest control as well as the use of fertilizers and growth regulators. Heavy peaches crops year after year tends to decrease nutrients availability in soil due to continuous removal of nutrients from the soil, thus application of fertilizers to improve yield of plant is required (Westwood, 1978). Auxins such as NAA have been used since a long time to improve fruit quantity and quality in many deciduous fruit tree. It controls fruit developing (Acquaah, 2005). Today the one remaining auxin that is registered for this use is NAA (Edgerton and Williams, 2009). Part of the MSc. thesis of the 3 author 2010 Received 28-72010 accepted 4/10/2010 Mesopotomia J. of Agric. (ISSN 1815 – 316X) Vol . (38) No . (Supplement 1) 2010 Stern et al., (2007) studied the effect of application of (30mg.lˉ1 NAA) on Japanese plum (Prunus salicina) at the beginning of pit-hardening when fruitlet diameter was ca. 13 mm caused appreciable and significant increases in fruit size. Since most of Iraqi soils are calcareous and their pH is high (Al-Zubaidi, 1989), this tends to decrease some nutrients availability. Potassium deficiencies greatly reduce crop yield. In fact, serious yield reduction may reduce with the appearance of deficiency symptoms and this phenomenon has been termed hiddenhunger (George, 2003). Photosynthesis is decreased with insufficient potassium whereas at the same time respiration may be increased, this seriously reduces the supply of carbohydrates and consequently the growth of the plant (Tisdale and Nelson, 1975). Ruiz (2006) applied a field trial with three sources of K (KNO3, K2SO4 and KCl) of early nectarines cv. Fairlane resulted in a significant increase in yield, fruit weight and diameter of the fruit by all the K sources, while no effects were measured in all evaluated seasons in terms of soluble solids levels in the fruit. Iron plays an important role in the activation of chlorophyll and in the synthesis of many heme proteins such as different cytochrome, which participate in different functions in the plant metabolism (Bhandari and Randhawa 1985). ElSheikh et al., (2007) Sprayed "Florida Prince and Desert Red" peach trees once, twice and thrice a year with combinations of chelate at the rate of Fe, Zn and Mn or combinations of Zn, Mn, Fe sulphate, The results indicated that spraying the trees twice or thrice yearly was more effective than spraying once a year or control in improving and increasing yield, fruit weight, fruit size and fruit firmness of both peach fruits. Moreover, they improved most of fruit quality parameters. This study investigates foliar application of nutrients and the interactive effect of NAA, KNO3 and Fe on nutrient status, shoot and yield characteristics of peach. MATERIALS and METHODS This study was conducted at Seiujh, 15km north of Duhok city, Kurdistan Region, Iraq in 2008 season. Table (2) shows the different components of the soil of the experiment location. Trees used in this study were four years old of peach (Prunus persica L) cv. Early Coronet, budded on seedling peach rootstocks, the trees were aproximatly similar in size and bloom density. When the mean of fruit diameter reached 9 ± 1.5mm, 54 peach trees, were grouped into three randomized complete blocks of 18 trees. Each tree was sprayed to drip point with a solution containing ( 0 , 5 mg NAA , 0, 0.1, 0.2 % KNO3 and 0, 30, 60 mg Fe ) alone or in combination at two date son April 24-2008 and May 25-2008, using 16 Liter sprayer. The surfactant agent Tween-80 was added to all the solutions at concentration 0.01%. Regular agricultural practices were applied to all trees throughout the experiment. The experiment was laid out as factorial in Randomized Complete Blocks Design (R.C.B.D) with three replicates, one tree per experimental unit. Observation on different growth parameter was recorded at the end of the experiment and at the final harvest (1 June) for determination fruit characteristics, twenty fruits were picked up randomly from each replicate as a composite sample. Duncan Multiple Mesopotomia J. of Agric. (ISSN 1815 – 316X) Vol . (38) No . (Supplement 1) 2010 Range Test was used for the comparison of treatment means at 5% level (Al-Rawi and Khalafallah, 1980). All the data were tabulated and statistically analyzed with computer using (SAS system 2002). Table (1): Some physical and chemical properties of orchard soil Characteristics Value Volumetric distribution of soil separates

EFFECT OF SOME CHEMICAL COMPOUNDS ON SOME CHARACTERISTICS OF SHOOT AND FRUIT OF PEACH (Prunus persica L.) CV. EARLY CORONET