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The possible impacts on wheat production of a recurrence of the 1930s drought in the U.S. Great Plains by Richard A. Warrick is a Environmental Science article available to read on EtoBox.

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What would be the impacts on wheat production if the U.S. Great Plains were to suffer another severe, prolonged drought? The 1930s drought is chosen as a worst-case scenario, and two sets of crop-yield regression models are employed to simulate yields using actual 1932-40 weather values and assuming constant 1975 technology. The results are first compared to normal or expected yields in each of 53 crop reporting districts in order to determine the range and spatial variation in yield departures over the nine-year period. Assuming a 1976 crop area, wheat production levels are then calculated and aggregated to give Plains-wide estimates for each year. It is found that the sequence of 1930s weather results in continuous, prolonged declines in expected production. Plains-wide yields are below normal (on average about 9-14%) for nine consecutive years. In the poorest years, the impacts are areally widespread with about nine-tenths of the Plains experiencing yield declines. The spatial variation in yields is substantial, however, ranging from over 100% to below 40% of expected even in the poorest years. In the worst year (1936), simulated production is sharply reduced by about -25%, or 9

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Author

Richard A. Warrick

Publisher

Springer; Springer-Verlag; Reidel Pub. Co.; Springer Science and Business Media LLC (ISSN 0165-0009)

Published

1984

Language

EN

Field

Environmental Science (Physical Sciences)