Abstract
Two areal scales were used to determine the effect of land size on wheat yield estimates from climatic data. The larger scale was the state of Oklahoma and the smaller scale included five crop reporting districts within the state. Two multilinear regression models were developed. One used unadjusted, and the other square-root adjusted, climatic data. Any comparative advantage of district modeling over a state model was judged upon the correlation coefficients of the model and its estimation capability over a five year trial period. When state and district models were compared in estimation capability, the state model achieved more accurate yield estimates of district wheat yields than did the individual district models.
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References
Bridge, D. W.: 1976, ‘A Simulation Model Approach for Relating Effective Climate to Winter Wheat Yields on the Great Plains’, Agr. Meteorology 17, 185–194.
Dixon, W. J. (Ed.): 1968, Biomedical Computer Programs, University of California Press, Berkeley. 281 pp.
Feyerherm, A. M.:1977, Response of Winter and Spring Wheat Grain Yields to Meteorological Variation, Final Rep. Prepared for Nat Aeronautics and Space admin., Johnson Space Center, Houston, Texas, Contract NAS9–14282. Kansas State University, Manhattan, Kansas, 64 pp. with 5 appendixes.
Greene, D. M.: 1977, A Comparison of Climatic Models on the Reliability of Winter Wheat Yield Predictions for Western Oklahoma, M. S. Thesis, Univ. Okla., Dep. Geography. 60. pp.
Hewes, L.: 1965, ‘Causes of Wheat Failure in the Dry Farming Region, Central Great Plains, 1939–1957’, Econ. Geography 41, 313–330.
Katz, R. W.: 1977, ‘Assessing the Impact of Climatic Change on Food Production’, Climatic Change 1, 85–96.
Lomas, J.: 1972, ‘Forecasting Wheat Yields from Rainfall Data in Iran’, World Meteorological Organ. Bull. 21, 9–14.
McQuigg, J. D.: 1975, Economic Impacts of Weather Variability, Atmos. Sci. Dep., Univ. Missouri, Columbia. 256 pp.
Penman, H. L. and Long, I. F.: 1960, ‘Weather in Wheat: An Essay in Micro-Meteorology’, Quart. J. Royal Meteorological Soc. 86, 16–50.
Pitter, R. L.: 1977, ‘The Effect of Weather and Technology on Wheat Yields in Oregon’, Agr. Meteorology 18, 115–131.
Thompson, L. M.: 1962, ‘Evaluation of Weather Factors in the Production of Wheat’, J. Soil and Water Conserv. 17, 149–156.
Thompson, L. M.: 1969, ‘Weather and Technology in the Production of Wheat in the United States’, J. Soil and Water Conserv. 23, 219–224.
United States Department of Agriculture, Statistical Reporting Service. ‘Oklahoma Wheat: Acreage, Yield and Production’, 1941 to 1975, Oklahoma City, Okla.
United States Department of Commerce: 1941 to 1975, Climatological Data. Oklahoma Vol. 50 (1941) to Vol. 84 (1975). U. S. Weather Bur., Environ. Sci. Service Admin., Washington, D. C.
Williams, G. D. V.: 1972, ‘Geographical Variations in Yield-Weather Relationships over a Large Wheat Growing Region’, Agr. Meteorology 9, 265–283.
Williams, G. D. V.: 1973, ‘Estimates of Prairie Provincial Wheat Yields Based on Precipitation and Potential Evapotranspiration’, Can. J. Plant Sci. 53, 17–30.
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Greene, D.M., Sutherland, S.M. & Kirkham, M.B. Influence of area on winter wheat climatic models. Climatic Change 2, 21–32 (1979). https://doi.org/10.1007/BF00138224
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DOI: https://doi.org/10.1007/BF00138224