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.
 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.
 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.
 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
 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
 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