Rockstr?m, J., Karlberg, L., Wani, S. P., Barron, J., Hatibu, N., Owesis, T., Bruggeman, A., Farahani, J. and Qiang, Z. (2010) Managing water in rain-fed agriculture – The need for a para-digm shift. Agricultural Water Management 97: 543-550.
 Hatibu, N., Young, M. D. B., Gowing, J. W., Mahoo, H. F. and Mzirai, O. B. (2003) Developing improved dry land cropping systems for maize in semi-arid Tanzania. Part 1: Experimental evidence of the benefits of rainwater har-vesting. Journal of Experimental Agriculture, 39(3): 279-292.
 Wani, S. P., Pathak, P., Sreedevi, T. K., Singh, H. P. and Singh, P. 2003. Efficient management of rainwater for increased crop productivity and groundwater recharge in Asia. In: Kijne, J. W., Barker, R., Molden and D. (Eds.), Water Productivity in Agri-culture: Limits and Opportunity for Improvement. CABI Pub-lishing and International Water Management Institute, Wal-lingford, UK, and Colombo, p56.
 Zaidi, P. H., Rafique, S., Rai, P. K. and Singh, N. N. (2003) Response of maize (Zea mays L.) cultivars to excess soil water stress: Mor-pho-physiological efforts and basis of tolerance. European Journal of Agronomy, 19(3) : 383-399.
 Frimpong, J. O., Amoatey, H. M., Ayeh, E. O. and Asare, D. K. (2011) Produc-tivity and soil water use by rain-fedr maize cultivars in a coastal savannah environment. International Agrophysics, 25 (In press).
 Tijani, F. O., Oyedele, D. J. and Aina, P. O. (2008) Soil moisture storage and water-use efficiency of maize planted in succession to different fallow treatments. Interna-tional Agrophysics, 22:81-87.
 Adamtey, N, Cofie, O., Ofosu-Budu, K. G., Ofosu-Anim, J., Laryea, K. B. and Forester, D. (2010). Effect of N-enriched co-compost on transpiration efficiency and water-use efficiency of maize (zea maize L.) under controlled irrigation. Agricultural Water management, 97:995-1005.
 Oktem, A. Simsek, M. and Okem, A. G. (2003) Deficit irrigation effects on sweet corn with drip irriga-tion system in a semi-arid region. I. Water-yield relationship. Agricultural Water Management, 61:63-74.
 Grassini, P., Hahh, A. J. and Mercan J. L. 2009. Limits to maize productivity in the western corn-belts: A simulation analysis for fully irrigated and rain-fedr condition. Agricultural and Forest Meteorology 149:1254-1265.
 Abbas, G., Hussain, A. Ahmed, A. and Wajid, A. S. (2005) Water use efficiency of maize as affected by irrigation schedules and nitrogen rates. Journal of Agricul-ture Society Science, 4(1): 339 -342.
 Asiedu, E. A., Sallah, P. Y. K., Twu-masi-Afriyie, S, Obeng,-Antwi, K., Ahenkora, K. and Adusei-Akowah, P. (2001) Agronomic and post harvest char-acterization of the three quality protein maize hybrids develoed in Ghana. Ghana Journal of Agricultural Science 34: 57-62.
 Dankyi, A. A., Sallah, P. Y. K., Adu-Appiah, A. and Gyamera,-Antwi, A. (2005) Determination of the adoption of quality protein maize, Obatanpa, in Southern Ghana – Lo-gistic regression analysis. Paper presented at the 5th West and Central Africa Regional Maize Workshop, IITA – Cotonou, Benin Republic, 2nd – 7th May, p. 6 -13.
 Morris, M. L., Tripp, R. and Dankyi, A. A. (1999). Adoption and impacts of improved maize production technology: A case study of the Ghana Grains development Project. Economics Program Paper 99 – 01. Mexico, D. F.: CIMMIT. p33 -41.
 Hunsaker, D. J., Kimball, B. A., Printer Jnr., P. J., La Mante, R. L., and Wall, G. W. (1996). Carbon dioxide enrichment and irrigation effect effects on wheat evaporation and water use efficiency. Trans-actions of ASAE, 39(4): 1345-1355.
 Mox, X., Liu, S., Lin, Z., Xu, Y. Xiang, Y. and Mcvicar, T. R. (2005) Prediction of yield, water consumption and water use efficiency with a SVAT – crop growth model using remotely sensed data on the North China Plain. Ecological Modelling Journal, 183: 301-322.
 Dagdelin, N., Yilmaz, E. Sezgin, F. and Gurbuz, T. (2006) water-yield relation and water use efficiency of cot-ton (Gossypium hirsutum L.) and second crop corn (Zea mays L.) in western Turkey. Agricultural Water Management, 82(1-2): 63-85.
 El-Tantawy, M. M., Ouda, A. S. and Khalil, A. F. (2007) Irrigation scheduling for maize grown under Middle Egypt conditions. Research Journal of Agricul-ture and Biological Sciences, 3(5): 456-462.