Page, A.L., Binglam, F.T., Ganje, T.J. and Garber, M.J. (1963) Availability and Fixation of Added Potassium in Two California Soils When Cropped to Cotton. Soil Science Society of America, Proceedings, 27, 323-326.
 Oosterhuis, D.M., Miley, W.N., Maples, R. and Wallschleger, S.D. (1991) Foliar Fertilization with Potassium Nitrate in Cotton. Beltwide Cotton Conferences, San Antonic, 8-12 January, 942.
 Tupper, G.R., Ebelhar, M.W. and Peringle, H.C. (1991) Potassium and Nitrogen Rate Interaction. Beltwide Cotton Conferences, San Antonic, 8-12 January, 925-927.
 Bakry, A.B., Nofal, O.A. and Zeidan, M.S. (2012) Agronomic Characteristics of Three Flax Varieties as Affected by Source of Potassium Fertilization under Newly Reclaimed Sandy Soil Conditions. Austration Journal of Basic and Applied Sciences, 6, 77-81.
 Amberger, A. (1991) Importance of Micronutrients for Crop Production under Semiarid Condition of North Africa and Middle East. Proceedings of 4th Micronutrients Workshop, Amman, February 1989, 5-30.
 Moawed, E.A. (2001) Effect of Micronutrients and New Distances on the Yield of Some Flax (Linum usitatissimum L.) Varieties. Egyptian Journal of Applied Sciences, 16, 157-172.
 Mostafa, S.H. and Deep, E.I. (2003) Response of Flax and Quality to Seeding Rates and Micronutrients. Alexandria Journal of Agricultural Research, 24, 425-442.
 Nofal, O.A., Zedian, M.S. and Bakry, B.A. (2011) Flax Yield and Quality Traits as Affected by Zinc Foliar Application under Newly Reclaimed Sandy Soils. Journal of Applied Sciences Research, 7, 1361-1367.
 El-Hariri, D.M., El-Sweify, A.H. and Mostafa, S.H. (1996) Response of Flax Yield to Cultivars, Phytohormone Level and Pulling Dates. Proceedings of 4th European Reg. Workshop on Flax, FAO, Rouen, 25-28.
 El-Hariri, D.M., Mostafaand, S.H. and El-Sweify, A.H. (1998) Effect of Potassium Fertilizer and Phytohormone Level on Yield Attributes, Yield and Quality of Flax in Sandy Soil. The 1st Nordic Conference on Flax and Hemp. Processing, St. Petersburg, 28-30 September 1998, 69-76.
 El-Hariri, D.M., Hassanien, M.S. and El-Sweify, A.H. (2004) Evaluation of Same Flax Genotype Straw Yield, Yield Components and Technological Characters. Journal of Natural Fibers, 1, 1-12.
 AOAC (1980) Official Methods of the Association of Official of Official Analytical Chemists. 11th Edition, Rockville.
 Gomez, K.A. and Gomez, A.A. (1984) Statistical Procedures for Agriculture Research. 2nd Edition, John Wiley and Sons, New York, 180.
 Gaffer, S.M., Hella, A.M. and Sahsan, A.I. (1985) Coperative Studies on Growth and Yield of Some Flax Varieties. Annals of Agricultural Sciences, Moshtohor, 23, 1483-1492.
 Sarour, S.Gh.R., Abou-Khadrah, S.H., Youssef, S.A., El-Kady, E.A.F. and Gazzar, A.A. (1992) Effect of Planting Pattern and Seeding Rate on Growth Yield and Quality of Some Flax Varieties. Proceedings of 5th Conference Agron. Zagazig, 2, 836-850.
 Mengel, K. and Kirkby, A. (1987) Chapter 16: Copper. In: Mengel, K., Kirkby, E.A., Kosegarten, H. and Appel, T., Eds., Principles of Plant Nutrition, 4th Edition, International Potash Institute, Bern, 537-549.
 El-Shahawy, T.A., Rokiek, K.G., Belbaa, L.K. and Abbas, S.M. (2008) Micronutrients, B-Vitamins and Yeast in Relation to Increasing Flax (Linum usitissimum L.) Growth Yield Productivity and Controlling Associated Weeds. Asian Journal of Agricultural Research, 2, 1-14. http://dx.doi.org/10.3923/ajar.2008.1.14
 Pandy, S.N. and Sinha, B.R. (1978) Plant Physiological. Chapter 6, 2nd Revised Edition, 115-120.
 Coke, L. and Whittington, W.J. (1968) The Role of Boron in Plant Growth: IV. Interrelationships between Boron and Indol-3YL-Acetic Acid in the Metabolism of Boron Radicals. Journal of Experimental Botany, 19, 295-308. http://dx.doi.org/10.1093/jxb/19.2.295
 Sillanpaa, M. (1982) Micronutrients and Nutrient Status of Soils: A Global Study (Soils Bulletin). FAO, Rome, 48-289.
 Amberger, A. (1974) Micronutrients Dynamics in the Soil and Function in Plant Metabolism. Proceedings of 1st Workshop of Egypt Botany Society, Cairo, 1974, 81-90.
 Hegab, A.A.T., Mahgoub, M.A. and Yossef, A.E. (1987) Effect of Iron, Manganese and Zinc on Yield. Cotton Grade and Quality of Fiber Properties of Egyptian Cotton. Agricultural Research Review, 65, 645.
 Eid, E.T., Abdel-Al., M.H., Ismail, M.S. and Wassel, O.M.M. (1997) Response of Egyptian Cotton to Potassium and Micronutrient Application. Proceedings of FAO-IRCRNC. Joint Meeting of the IRCRNC Working Groups on Cotton Nutrition and Growth Regulators in Cotton, Cairo, 20-23 March 1995, 139-145.
 Sawan, Z.M., Hafez, S.A. and Basyony, A.E. (2001) Effect of Phosphorus Fertilization and Foliar Application of Chelated Zinc and Calcium on Seed-Protein and Oil Yields and Oil Properties of Cotton. Journal of Agricultural Science, 136, 191-198. http://dx.doi.org/10.1017/S0021859601008644
 Abdel Shafy, M.A., El-Menshawy, M.E. and Girgis, E.A. (2001) Effect of Some Macro and Micronutrients Fertilization on Cotton Yield. Minofiya Journal of Agricultural Research, 26, 673-687.
 Fazwi, A.F.A. (1991) Micronutrients Effect on Field Crops in Egypt. In: El-Fouly, M.M. and Fazwi, A.F.A., Eds., Proceedings of 4th Micronutrients Workshop, Amman, February 1989, 75.