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Ozean Journal of Applied Sciences 2(2), 2009for efficient use by the crop. However, drip fertigation helped in alleviating the problem of K deficiency inthis sandy soil. Finally, frequent supplementation of nutrients with irrigation water increased theavailability of N, P and K in the root zone and which in turn influenced the yield and quality of tomato.REFERENCESAllen, R.G., Pereira, L.S., Raes, D. and Smith, M., (1998). Crop evapotranspiration. Guidelines forcomputing crop water requirements. FAO Irrigation and Drainage. Paper No. 56, FAO, Rome, Italy, p.300.Aramini, G., Catania, F., Colloca, L., Oppedisano, R. and Paone, R. (1995). Fertilizer trial on tomatoes forfresh consumption. Colture-Protette 24 (5), 83–86.Badr, M.A. and Shafei, A.M. (2002). Effect of acidified water on nutrients availability and plant growth insandy soil under drip irrigation system. Egypt. J. Appl. Sci., 17 (11): 718-734.Boyhan, G., Granberry, Darbie and Kelley, Terry (2001). Onion production guide, Bulletin 1198. Collegeof Agricultural and Environmental Sciences, University of Georgia, p. 56.Chawla, J.K. and Narda, N.K. (2000). Growth parameters of trickle fertigated potato. Indian J. Agric. Sci.70 (11): 747-752.Cottenie, A. 1980. Soil and plant testing as a basis of fertilizer recommendation. F.A.O. Soil Bull., 3812.Dangler, J.M., and Locascio, S. (1990). Yield of trickle-irrigated tomatoes as affected by time of N and Kapplication. J. Amer. Soc. Hort. Sci. 115: 585-589.Hanson, B.R., Simunek, J. and Hopmans, J.W. (2006). Evaluation of urea–ammonium–nitrate fertigationwith drip irrigation using numerical modeling. Agricultural Water Management, 86: 102-113.Hebbar, S.S., Ramachandrappa, B.K., Nanjappa, H.V. and Prabhakar, M. (2004). Studies on NPK dripfertigation in field grown tomato (Lycopersicon esculentum Mill.). Europ. J. Agronomy, 21: 117-127.Hochmuth, G. J. (1994). Plant petiole sap-testing guide for vegetable crops. Fla. Coop. Ext. Serv. Circ.1144.Ibrahim, A. (1992). Fertilization and irrigation management for tomato production under arid conditions.Egyptian J. Soil Sci. 32 (1), 81–96.Jackson, M.L. (1973). Soil chemical analysis. Prentice-Hall India Privet Limited New Delhi.Lara, D., Adjanohoun, A. and Ruiz, J. (1996). Response of tomatoes sown in the non-optimal season tofertigation on a compacted red ferralitic soil. Cultivar Tropicales 17 (1): 8-9.Li, J, Zhang, J. and Ren, L. (2003). Water and nitrogen distribution as affected by fertigation of ammoniumnitrate from a point source. Irrig. Sci., 22: 19-30.Li, J., Zhang, J. and Rao, M. (2004). Wetting patterns and nitrogen distributions as affected by fertigationstrategies from a surface point source. Agricultural Water Management, 67: 89-104Locascio, S. J., G. Hochmuth, Rhoads, F.M., Olson, S.M., Smajstrla, A.G. and Hanlon, E.A. (1997).Nitrogen and potassium application scheduling effects on drip-irrigated tomato yield and leaf tissueanalysis. Hortscience. 32: 230-235.Locascio, S.J., Olson, S.M. and Rhoads, F.M. (1989). Water quantity and time of N and K application fortrickle-irrigated tomatoes. J. Amer. Soc. Hort. Sci., 114: 265-268.Mmolawa, K. and Or, D. (2000). Water and solute dynamics under a drip-irrigated crop: experiments andanalytical model. Trans. ASAE 43 (6): 1597-1608.Narda, N.K. and Chawla, J.K. (2002). A simple nitrate sub-model for trickle fertigated potatoes. Irrig.Drain. 51: 361-371.Or, D. and Coelho, F.E. (1996). Soil water dynamics under drip irrigation: transient flow and uptakemodels. Trans. ASAE 39 (6): 2017-2025.Patel, N. and Rajput, T.B.S. (2000). Effect of fertigation on growth and yield of onion. In: Micro Irrigation,CBIP publication no. 282: 451-454.Rhoads, F.M., Olson, S.M., Hochmuth, G.J. and Hanlon, E.A. (1996). Yield and petiole-sap nitrate levelsof tomato with N rates applied preplant or fertigated. Soil Crop Sci. Soc. Fla. Proc. 55:9-12.Rivera, R.N., Duarte, S.N., DE Miranda, J.H. and Botrel, T.A. (2006). Potassium modeling dynamics in thesoil under drip irrigation: model validation. Eng. Agríc., Jaboticabal, 26 (2): 388-394.Santos, D.V., Sousa, P.L. and Smith, R.E. (1997). Model simulation of water and nitrate movement in alevel-basin under fertigation treatments. Agricultural Water Manage, 32: 293-306.146