Abdeldagir, A. H.; M. A. Errebhi; H. M. Al Sarhan, and M. Ibrahim, (2003),The effect of different levels of additional potassium on yield and industrial qualities of potato (Solanum tuberosum L.) in an irrigated arid region. Amer. J. Potato Res. 80:219-222.
Allen, R.G.; L.S. Perira; D. Raes and M. Smith, (1998), Crop Evapotranspiration. FAO Irrigation and Drainage paper 56, Rome.20-25.
Arab Organization for Agricultural Development.2006. (C. F. PhD Thes., Omar Hasham. 2009. Univ. of Baghdad. Coll. of Agr.).
Bowen, W.T., (2003), Water productivity and potato cultivation.In water productivity in agriculture: limits and opportunities for improvement. Ed. J. W. Kinje, R. Baker and D. Molden. CAB: 229-238.
Chapman, K. S. R.; L. A. Sparrow; P.R. Hardman; D. N. Wright and J.R. A. Thorp, (1992), Potassium nutrition of Kennebec and Russet Burbank potatoes in Tasmania: Effect of soil and fertilizer potassium on yield, petiole and tuber potassium concentrations and tuber quality. Australian J. Exp. Agric. 32:521-527.
Davenport, J. R., and E. M. Bentley, (2001) Does potassium fertilizer form, source, and time of application influence potato yield and quality in Columbia basin. Amer. J. Potato Res. 78:311-318.
Erdem, T.; Y. Erdem; H. Orta and H. Okursoy, (2006), Water – yield relationships of potato under different irrigation methods and regimes. Sci. Agric. 63(3):226-231.
Hart, T. G. and O. Smitm, (1966),Effect of levels sources of potassium on absorption of phosphorus by potatoes. Lants. Amer. Potato J. 43:217-235.
International Year of the Potato, (2008), Potato and water resources
, Secretariat FAO. E-mail:
potato2008@fao.org.
Kiziloglu, F.M.; U. Sahin; T. Tune and S. Diler, (2006). The effect of deficit irrigation on potato evapotranspiration and tuber yield under cool season and semiarid climatic conditions. J. Agron., 5: 284–288.
Mahmood, J. T, (2006), Effect of NPK addition and foliar application on growth, yield and components of potato plants tubers. MSC Thes. Univ. of Baghdad. Coll. of Agric.70-77.
Onder, S.; M. Caliskan; D. Onder and S. Caliskan (2005). Different irrigation methods and water stress effects on potato yield and yield components. Agric. Water Manage. 73:73-86.
Omar, H. M. (2009), Use of animal manures and whey as a system for organic farming and it effect on growth and production of potatoes. PhD Thes. Univ. of Baghdad. Coll. of Agric.1-3.
Pissarek, H. P., (1993), The development of potassium deficiency symptoms in spring rape. 2- Pfanzmerahr. Bodenk. 136:1-96.
SAS, (2002), SAS Users guide,Statistics SAS, Inst.Gary,N.C.,U.S.A.
Shock, C.C, (2004), Efficient irrigation scheduling. Malheur Exp.St. Oregon St. Univ., Oregon, USA. 55-100
Spooner, D. M. and J. B. Bamber, (1994).. Potato genetic resources: sources of resistance and systematic. Amer. Potato J.71:325-338.
Thornton, M.K, (2002), Effects of heat and water stress on the physiology of potatoes. Idaho Potato Conf., Idaho. 23-88.
Tisdale, S. L., W. N. Nelson and J. D. Havlin, (1997), Soil Fertility and Fertilizers. Prentice-Hall New Delhi.113-145.
Van Loon, C.D, (1981), The effect of water stress on potato growth, development and yield. Am. Potato J., 58: 51–69.
Westermann, D. T.; D. W. James; T.A. Tindall and R. L. Hurst, (1994), Nitrogen and potassium fertilization of potatoes: Yield and specific gravity. Amer. Potato J.71:417-432.
Yuan, B.Z.; S. Nishiyama and Y. Kang, (2003), Effects of different irrigation regimes on the growth and yield of drip-irrigated potato. Agric. Water Manag., 63: 153–167.