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Accueil du site → Doctorat → États-Unis → 1987 → THE IMPACTS OF PROJECTED CLIMATIC CHANGE ON FARMING IN WESTERN OKLAHOMA

University of Oklahoma (1987)

THE IMPACTS OF PROJECTED CLIMATIC CHANGE ON FARMING IN WESTERN OKLAHOMA

HAMID, KOUSAY ABDULMAJID

Titre : THE IMPACTS OF PROJECTED CLIMATIC CHANGE ON FARMING IN WESTERN OKLAHOMA

Auteur : HAMID, KOUSAY ABDULMAJID

Université de soutenance : University of Oklahoma

Grade : Doctor of Philosophy (PhD) 1987

Résumé
Good weather, technology, and an increase in food prices have helped the United States to extend its agricultural activities to arid and semi-arid lands, which is not suitable for agricultural production if adequate moisture is not available. Western Oklahoma offers a local example of this expansion. The questions to be asked are as follows : What will be the impacts of climatic change on agricultural yield and thus on the standard of living in western Oklahoma ? What should policymakers do to reduce the risk of climatic change on farming in western Oklahoma ? It is known that crop yield responds mainly to the amount of moisture and the temperature. Therefore, any change in the present climate will impact farming practices. This research examines the possible impacts of climatic change on farming in western Oklahoma. The results of this study indicate that prolonged climatic changes will impact crop yields in western Oklahoma and that the effects will vary depending on the type of climatic changes. Using stepwise regression, the results show that soil moisture and temperature correlate with wheat, sorghum and barley yields. Then, four scenarios are proposed : wetter and warmer, wetter and cooler, drier and warmer, and drier and cooler than average. Using analysis of variance (ONEWAY), the results in general show that the differences between yields in the wetter scenarios and those in the drier and warmer scenario are significant. These results with others have been used to suggest future farming policies in each scenario. It is concluded that no dramatic changes in farming methods need be suggested for the wetter than average scenarios. However, dramatic changes in crop patterns, changes from farming to ranching in northern districts, and adoption of dryland farming in southern districts in western Oklahoma are suggested for the drier and warmer scenario. Ranching in the Panhandle and dryland farming in the other three districts, along with changes to crops with greater resistance to drought, are suggested for the drier and cooler scenario. The results of this research in general indicate that using the right crop which responds positively to the change in climate as well as using the right farming method will reduce the risk of the crop yield.

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