1- Abbasi Y., Bakhshi D., Forghani A., Sabouri A., and Porghauomy M. 2012. Effect of macro and micronutrients sprays on fruit quality and quantity of zard and rowghani olive (Olea europaea L.) cultivars in Northern Iran. American Eurasian Journal Agricultural and Environment Science, 12: 1548-1552.
2- Aocs. 1993. Officinal methods and recommended practices of the American oil chemists, Society, 4th. Edn. (ed .D. firestone), American oil chemists society, Champaign., IL.AOCS Aa, 4-38.
3- Ben Mimoun M., Loumi O., Ghrab M., Latiri K., and Hellali R. 2004. Foliar potassium application on olive tree.IPI regional workshop on potassium and fertigation development in West Asia and North Africa; Rabat, Morocco, 24-28 November, 2004.
4- Dik melik U.G., Puskulcu M., Altug M.E., and Rget T. 1999. The effect of KNO3 application on the yield and fruit quality of olive, In: Anac D., and P. Martin- Prevel (eds), Improved crop quality by Nutrient Management, Springer, Netherlands, 77-80.
5- El-Khawaga A.S. 2007. Improving growth and productivity of manzanillo olive trees with foliar application of some nutrients and girdling under sandy soil. Journal Science Research, 3: 818-822.
6- Emami F. 1996. Methods of plant analysis .Agricultural extension, education and research organization. Soil and water Research Institute, 185. (In Persian)
7- Inglese P., Gullo G., and Pace L.S. 2002. Fruit growth and olive quality in relation to foliar nutrition and time of application. Acta Hort, 586: 507-509.
8- Ghaderi N., Vezvaei A., Talaei A.R., and Babalar M. 2002. Effect of boron and zinc foliar spraying as well as concentrations of these elements on some leaf and fruit characteristics of almond. Iranian, Journal Agricultural Science, 32(2): 374-384. (In Persian with English abstract)
9- Hartmann H.T., Uriu K., and Lillel O. 1996. Olive nutrition. In Fruit nutrition, ed. N. F. Childers, 252-261. New York: Horticultural Publications, Rutgers University.
10- Hegazi E.S., Mohamed S.M., EL Sonbaty M.R., Abd El Naby S.K.M., and El Sharony T.F. 2011. Effect of potassium nitrate on vegetative growth, nutritional status, yield and fruit quality of olive cv. Picual. Journal of Horticultural Science and Ornamental Plants, 3(3): 252-258.
11- Jordao P.V., and Lieto F. 1990. The olive mineral composition and some parameter, of quality in fifty olive cultivars in Portegal. Acta Horticultural. 286: 461-464.
12- Khayyat M., Tafazoli E., Eshghi S., and Rajaee S. 2007. Effect of nitrogen, boron, potassium and zinc Sprays on yield and fruit quality of date palm. American-Eurasian Journal Agricultural and Environment Science, 2(3): 289-296.
13- Laila F.H., Abd E.L., Migeed M.M.M., Attia M.F., Shahin M.F.M., and Genaidy E.A.E. 2015. Influence of spraying zinc sulphate before and during blooming stage on fruit quality and quantity of manzanillo olives. Journal Agricultural Technology, 11(4): 875-888.
14- Malakouti M.J., and Tabatabaei S.J. 2001. Innovative approach to balanced nutrition of fruit trees. Tehran, Iran. Agricultural Education Publication, 34-35. (In Persian)
15- Marschner H. 1995. Mineral nutrition of higher plants, 2nd Ed. Academic Press Ltd, London, 45-53.
16- Ramezani S., Shekafandeh A., and Taslimpour M. R. 2009. Effect of GA3 and zinc sulfate on yield and fruit quality of Shengeh olive trees. Scientia Horticulturae. (In Persian with English abstract)
17- Ramezani S., and Shekafandeh A. 2011. Influence Zn and K sprays on fruit and pulp growth in olive (Olea europaea L. cv. amygdalifolia). Iran Agricultural Research, 30(1-2): 1-10.
18- Restrepo Diaz H., Benlloch M., Navarro C., and Fernandez Escobar R. 2008. Potassium fertilization of rainfed olive orchards. Scientia Horticulturae, 116: 399-403.
19- Saadati Jebeli S., Moallemi N., Mortazavi M.H., and Seyed Nejad S. M. 2011. The effect of foliar application of zinc and boron on quantitative and qualitative characteristics of three olive cultivars. M.Sc. Thesis. Shahid Chmran University of Ahvaz. 83-105. (In Persian with English abstract)
20- Sarkar D., Mandal B., and Kundu M.C. 2007. Increasing use efficiency of boron fertilizers by rescheduling the time and methods of application for crops in India. Plant Soil, 301: 77–85.
21- Sarrwy S.M.A., Mohamed E.A., and Hassan H.S.A. 2010. Effect of foliar sprays with potassium nitrate and mono-potassium phosphate on leaf mineral contents, fruit set, yield and fruit quality of picual olive trees grown under sandy soil conditions. American-Eurasian Journal of Agricultural and Environmental Sciences, 8(4): 420-430.
22- Sayyad Amin P., Shahsavar A.R., and Aslmoshtaghi E. 2015. Study on foliar application nitrogen, boron and zinc on olive tree. Trakia Journal of Sciences, 2: 131-136.
23- Wang M., Zheng Q., Shen Q., and Guo S. 2013. The critical role of potassium in plant stress response. International Journal of Molecular Sciences, 14: 7370-7390.
24- Zivdar S., Arzani K., Kazem Souri M., Moallemi N., and Seyed Nejad S. M. 2015. Effect of foliar potassium application on physiological and biochemical characteristics of olive (Olea europaea L.) cultivars under Ahvaz environmental conditions. Ph.D. Thesis. Department of Horticultural Science. Faculty of Agriculture, Tarbiat Modares University, 66-106. (In Persian with English abstract)