Fruit Quality And Net Income Response Of Tomato (Lycopersicon Esculentum Mill.) To Different Levels Of Nitrogen And Plant Population In Alamata, Ethiopia
Abrha Kebede, Gebremedhin Woldewahid
Keywords: Fruit quality, Income, Nitrogen fertilizer, plant population, Response, tomato.
Abstract: A study was conducted in the 2007 and 2008 cropping seasons to determine the effects of nitrogen and plant population on quality and net income of tomato (Lycopersicon esculentum Mill.) in northern Ethiopia. The design was a randomized complete block design with three replications. Data collected and analyzed included crop quality attributes and partial budget analysis. Application of N fertilizer significantly increased Total Soluble solid (TSS), fruit dry matter percentage (DM %) and fruit diameter. Higher fruit TSS and DM % were obtained at 230 kg N/ha compared to the other treatments. Intermediate N rate application (138 kg/ha) gave the highest values of fruit yield parameters and net return profits compared to the control. Similarly, Plant population had significant influence on fruit d DM % and fruit diameter.
 Bremner, J.M. and C.S. Mulvaney. 1982. Nitrogen Total. In: page AL (Eds.). Method of soil Analysis: Part 2. Chemical and Micro-Biological properties.Ameri. Soci. Agronomy. Madison, Wisclusa. 12: 595-624.
 Ethiopian Fruits and Vegetables Enterprise. Annual report. 1984 - 1987.
 Ewing, E.E. 1997. Potato. In: Wien, H. C. 1997.The physiology of vegetable crops.Cab international.USA.FAO. 1994. FAO production year book, vol.47, 1993. Food and Agriculture organization, Rome.
 FAO. 2007. Integrated plant nutrition information system. Retrieved April10, 2007, from http:// www.fao.org/ag/agl/agll/ipnis/districtdata.asp?districtid=ETH011003??6 - 14k –
 Girmachew T. 2007. Effects of Planting Methods and Nitrogen Rate on Yield and Quality of Tomato. MSc Thesis submitted to the school of graduate studies, Alemaya University, Ethiopia.
 Jacson, M.L., 1958. Soil chemical analysis. Prentice-Halls Inc., Madison, Wisconsin, USA p.545-566.
 McAvoy, R.J., H.W., Janes, B.L. Godfriaux, M. Secks, D. Duchai and W.K. Wittman, 1989. The effect of total available photosynthetic photon flux on single truss tomato growth and production. J. Hort. Sci. 64: 331-338.
 Ministry of Agriculture. 1988. Agriculture development department horticulture section survey data.
 Olsen, S.R., C.V. Cole, F.S. Watenabe and L.A. Dean, 1954. Estimation of available phosphorus in soils by extraction with Sodium Bicarbonate. U.S. Government Printing office, Wash. Circular no. 939. 19:99-105.
 Rick,C.M. 1978. The tomato. Scientific American Journal. 239(8), 67-76.
 Sahlemedhin Sertsu, 1999. Draft guideline for regional soil testing laboratories. NFIA, Addis Abeba, Ethiopia.
 Sims,W. et al. 1979. Mechanized growing and harvesting of processing tomatoes. University of California leaflet No.2686.
 Upton, M. 1979.Farme management in Africa: The principle of production and Planning. Oxford university press, Great Britain. Pp.
 Walkey, A. and I.A. Black, 1934. An experimentation of the digestion method for determination of organic matter and proposed modification of the chronic acid titration methods. Journal of Soil Science. 37:29-38.
 Wendmu, B. and A. Getachew. 1997. Soil management and crop technologies for improved crop production. In: Beyene S. and D. Abera (eds.) 1998.Agricultural research and technology transfer attempts and achievements in northern Ethiopia. Proceedings of the forth technology generation, transfer and gap analysis workshop. 18-21 March 1997,Bahir Dar Ethiopia.
 Wien, H.C., 1997. The Physiology of Vegetable Crops. CAB International, UK. 662p.