AS  Vol.8 No.5 , May 2017
Demonstrating Effect of Rainfall Characteristics on Wheat Yield: Case of Sinana District, South Eastern Ethiopia
Abstract: Demonstrating Effects of Current and Projected Rainfall Characteristics on Wheat yield has been investigated in Sinana district for the period 1995-2016. Data on rainfall and crop yield for the period 1995-2016 were obtained from National Meteorological Agency and Sinana District Agricultural Offices, respectively. Following data quality checking, rainfall data (current and future), correlation and regression studies were analyzed using Statistical software like Instat V3.36 and SPSS V20. Downscaling the output of CSIRO-Mk3.6.0 GCM model (daily rainfall data) for RCP8.5 emission scenario using a web based software tool (Marksim GCM) for the period 2020-2049 were used to determine seasonal total rainfall and ascertain its impact on yield. This study used mean, coefficient of variation, correlation and regression analysis to ascertain the relation, cause and effect relationship between rainfall characteristics and wheat yields. The results indicated that the mean onset date of the main rainy season (JJAS) for Robe and Sinana station was June 30 and July 3. Furthermore, the results of Pearson Correlation Coefficients indicated that kiremt rainfall total (JJAS) had moderate positive relationship (r = 0.499) with wheat yield in the study area. It was also observed that nearly fifty percent of total variance of crop yield is explained jointly by kiremt rainfall total and rainy day (R2 value was 47.9%). The result of projected wheat yield indicated that there will be a slight decrease in wheat yield (qt/ha) after 2030 years due to the impact of expected weakening of kiremt rainfall total. Taking in to account the above findings, it could be suggested that the farmers’ community will be encouraged encouraged to utilize timely climate information issued from National Meteorological Agency of Ethiopia (NMA) and other centers for farm level decision to enhance their crop production.
Cite this paper: Bekele, F. , Korecha, D. and Negatu, L. (2017) Demonstrating Effect of Rainfall Characteristics on Wheat Yield: Case of Sinana District, South Eastern Ethiopia. Agricultural Sciences, 8, 371-384. doi: 10.4236/as.2017.85028.

[1]   Zermoglio, M.F. (2011) Climate Information to Support Adaptation Decisions in Africa. Technical Report to International Resources Group and U.S. Agency for International Development.

[2]   Makombe, G., Kelemework, D. and Aredo, D. (2007) A Comparative Analysis of Rainfed and Irrigated Agricultural Production in Ethiopia. Irrigation and Drainage Systems, 21, 35-44.

[3]   Beweket, W. (2009) Rainfall Variability and Crop Production in Ethiopia Case Study in the Amhara Region. Department of Geography and Environmental Studies, Addis Ababa University.

[4]   Raorane, A.A. and Kulkarni, R.V. (2012) Data Mining: An Effective Tool for Yield Estimation in the Agricultural Sector. Report of the Intergovernmental Panel on Climate Change, Cambridge University Press, Cambridge.

[5]   World Bank (2006) Managing Water Resources to Maximize Sustainable Growth: A World Bank Water Resources Assistance Strategy for Ethiopia. A Country Water Resources Assistance Strategy. World Bank, Washington DC.

[6]   Deressa, T.T. (2006) Measuring the Economic Impact of Climate Change on Ethiopian Agriculture: Ricardian Approach. CEEPA DP25, University of Pretoria, South Africa.

[7]   NMA (2001) Initial National Communication of Ethiopia to the United Nations Frame-Work Convention on Climate Change (UNFCCC). Addis Ababa, Ethiopia.

[8]   Deressa, T.T. (2007) Measuring the Economic Impact of Climate Change on Ethiopian Agriculture: Ricardian Approach. World Bank Policy Research Working Paper No. 4342, World Bank, Washington DC.

[9]   Lemi, A. (2005) Rainfall Probability and Agricultural Yield in Ethiopia. Eastern Africa Social Science Review, 21, 57-96.

[10]   NMA-NAPA (2007) Climate Change National Adaptation Program of Action (NAPA) of Ethiopia. Ministry of Water Resources, Addis Ababa.

[11]   Deressa, T.T., Hassan, R.M., Ringler, C., Alemu, T. and Yesuf, M. (2009) Determinants of Farmers’ Choice of Adaptation Methods to Climate Change in the Nile Basin of Ethiopia. Global Environmental Change, 19, 248-255.

[12]   IPCC (2007) Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge University Press, Cambridge, UK and New York, USA.

[13]   Cayan, D., et al. (2013) Future Climate: Projected Average. In: Garfin, G., Jardine, A., Merideth, R., Black, M. and LeRoy, S., Eds., Assessment of Climate Change in the Southwest United States: A Report Prepared for the National Climate Assessment, Southwest Climate Alliance, Island Press, Washington DC, 101-125.

[14]   Green, T.R., Taniguchi, M., Kooi, H., Gurdak, J.J., Allen, D.M., Hiscock, K.M., Treidel, H. and Aureli, A. (2011) Beneath the Surface of Global Change: Impacts of Climate Change on Groundwater. Journal of Hydrology, 405, 532-560.

[15]   Jones, P.G. and Thornton, P.K. (2013) Generating Downscaled Weather Data from a Suite of Climate Models for Agricultural Modeling Applications. Agricultural Systems, 114, 1-5.

[16]   Bessie, S. (2010) Input Supply and Output Marketing Role of Multipurpose Cooperatives in Increasing Cereal Production in Bale Zone (Oromia Regional State), Ethiopia. MSc Thesis, Addis Ababa University, Addis Ababa.

[17]   SDAO (2006) Sinana District Agricultural Office, Annual Physical Year Report, Documented File, Bale-Robe.

[18]   MoA (Ministry of Agriculture) (2000) Agro-Ecological Zonation’s of Ethiopia. Addis Ababa, Ethiopia.

[19]   NMSA (1996) Climate & Agro Climate Resources of Ethiopia. NMSA Meteorological Research Report Series, Vol. 1, No. 1, and Addis Ababa.

[20]   Bogale, S., Solomon, M. and Yami, A. (2009) The Interdependence of Crop-Livestock Production Sectors: The Case of Sinana Dinsho District in Bale Highlands of Ethiopia. Agricultura Tropica et Subtropica, 42, 65-71.

[21]   Abbas, F., Ahmad, A., Safeeq, M., Ali, S., Saleem, F., Hammad, H.M. and Farhad, W. (2013) Changes in Precipitation Extremes over Arid to Semiarid and Subhumid Punjab, Pakistan. Theoretical and Applied Climatology, 116, 671-680.

[22]   Gonzalez-Rouco, J.F., Jimenez, J.L., Quesada, V. and Valero, F. (2001) Quality Control and Homogeneity of Precipitation Data in the South West of Europe. Journal of Climate, 14, 967-978.<0964:QCAHOP>2.0.CO;2

[23]   SUPARI (2012) Spatiotemporal Characteristics of Extreme Rainfall Events over Java Island. Submitted to M.Sc Program, Faculty of Geo-Information and Earth Observation, University of Twente, Enschede.

[24]   Jones, P.G. and Thornton, P.K. (2000) MarkSim: Software to Generate Daily Weather Data for Latin America and Africa. Agronomy Journal, 9, 445-453.

[25]   Yang, W., Seager, R., Cane, M.A. and Lyon, B. (2014) The East African Long Rains in Observations and Models. Journal of Climate, 27, 7185-7202.

[26]   Raman, C.V.R. (1974) Analyses of Commencement of Monsoon Rains over Maharashtra State for Agricultural Planning. Scientific Report 216, India Meteorological Department, Poona, India.

[27]   Sivakumar, M.V.K. (1988) Predicting Rainy Season Potential from the Onset of Rains in Southern Sahelian and Sudanian Climatic Zones of West Africa. Agricultural and Forest Meteorology, 42, 295-305.

[28]   Stern, R.D. and Coe, R. (1982) The Use of Rainfall Models in Agricultural Planning. Agricultural Meteorology, 26, 35-50.

[29]   Stern, R., Rijks, D., Dale, I. and Knoch, J. (2006) Instat Climatic Guide. Statistical Services Center, Reading University, Reading, UK.

[30]   Stocker, T.F., et al., Eds., IPCC (2013) Climate Change 2013: The Physical Science Basis. Contribution of Working Group I to the Fifth Assessment Report 1 of the Intergovernmental Panel on Climate Change. Cambridge University Press, Cambridge and New York, 1535 p.

[31]   Segele, Z.T. and Lamb, P.J. (2005) Characterization and Variability of Kiremt Rainy Season over Ethiopia. Meteorology and Atmospheric Physics, 89, 153-180.

[32]   Agrawal, R., Jain, R.C. and Jha, M.P. (1986) Models for Studying Rice Crop-Weather Relationship. Mausam, 37, 67-70.

[33]   Odekunle, T.O., Orinmoogunje, I.O. and Ayalande, A. (2007) Application of GIS to Assess Rainfall Variability impact on Crop Yield in Guinea Savanna Part of Nigeria. Journal of Biotechnology, 6, 2100-2113.

[34]   Gissila, T., Black, E., Grimes, D.I.F. and Slingo, J.M. (2004) Seasonal Forecasting of the Ethiopian Summer Rains. International Journal of Climatology, 24, 1345-1358.