(1)                 The economic constraints of production of field crops in the Northern Province of Sudan: A poster. M.A. Elfeel. The XX II International Conference of Agricultural Economists, Harare, Zimbabwe, August, 1994.

(2)                 The economic constraints of production in the Northern Province of Sudan: An Econometric Approach. M. A. Elfeel, Babiker I. and J. Davis, U. of K. J. Agric. Sci. 9(1), 2001.

(3)                 Crop share tenancies and labor allocative efficiency in Rahad Agricultural Scheme. A. Hussein and M. A. Elfeel. U. of K. J. Agric. Sci. 9(1), 2001.

(4)                 Productivity in irrigated agriculture with emphasis on labor resource. O. M. Babiker and M. A. Elfeel. U. of K. J. Agric. Sci. 10(1), 2002.

(5)                 An economic analysis of citrus, date-palms and mangoes production in the Northern state of Sudan. M.A. Elfeel, Journal of Saudi Society for Agric. Sci. 3(1), 2004.

(6)                 Competitiveness and profitability of local wheat in Gezira scheme (Sudan). A. Abdul Azeem and M.A. Elfeel. J. Saudi Soc. for Agric. Sci. 3(2), 2004.

(7)                 Measuring market integration: an application to selected sesame markets in Sudan. K.H.A. Siddig and M.A. Elfeel. J. Saudi Soc. for Agric. Sci. 4(1), 2005.

(8)                 Productivity and resource allocation efficiency of farmers in Gezira scheme (Sudan). A. Al-Hag and M.A. Elfeel. J. Saudi Soc. for Agric. Sci. 4(2), 2005.

(9)                  An Economic Analysis of Factors Affecting Wheat and Broad beans productivity in River Nile State. M.Alfeel and A. Hamza. J. Saudi Soc. for Agric. Sci. 5(2), 2006.

(10)              Marketing costs of Some Vegetables and Fruits in Saudi Arabia. S. AlGahtani and M.A. Alfeel. Alxandria J. for science exchange. 27 (3), 2006.

(11)              Mangement and Technical Efficiency of Cotton Production in Gezira Scheme, Sudan. Adam E. Ahmed, F. Kuhlmann, M. Mau and M. A. Alfeel. J. Saudi Soc. for Agric. Sci. 6(1), 2007.

(12)              Marketing Margins of Some Vegetables and Fruits in Saudi Arabia. S. AlGahtani and M.A. Alfeel. J. Saudi Soc. for Agric. Sci. 6(2), 2007.

(13)              A comparative study of impacts of formal and informal credit on productivity in River Nile State. S. E. Suleiman and M. A. Elfeel. J. Saudi Soc. for Agric Sci. 7 (1), 2008.

(14)              Sudanese live sheep and mutton competitiveness. Babikir Idris Babikir, Abdul Jabbar Mohamed Abdullah and Mohamed Ahmed Alfeel. Under publication.