TAILIEUCHUNG - Climatic considerations which support the choice between natural rubber and oil palm in Nakhon Si Thammarat, southern Thailand

This study concluded that natural rubber was a more climatically suitable crop for Nakhon Si Thammarat province, if only the four stated climatic variables were considered. | Kasetsart Journal of Social Sciences 38 2017 273e281 Contents lists available at ScienceDirect Kasetsart Journal of Social Sciences journal homepage http locate kjss Climatic considerations which support the choice between natural rubber and oil palm in Nakhon Si Thammarat southern Thailand Rattana Unjan Ayut Nissapa Rawee Chiarawipa Faculty of Natural Resources Prince of Songkla University Songkhla 90112 Thailand a r t i c l e i n f o a b s t r a c t Article history Four climatic variablesdrainfall number of rainy days relative humidity and temper- Received 15 February 2016 aturedwere studied to observe the characteristics and probable occurrences outside the Received in revised form 11 July 2016 required bounds for the optimal growth of oil palm and natural rubber. These two eco- Accepted 15 July 2016 nomic crops have become increasingly popular among farmers in Nakhon Si Thammarat Available online 18 September 2017 province southern Thailand. Monthly and annual data during 1981e2011 were analyzed using appropriate time-series techniques. The out-of-bound probabilities were calculated Keywords using the counting method. Only the rainfall showed a significant and increasing trend choice while the trends in the other variables were not significant. All studied variables showed climatic variables seasonal fluctuation and cyclical movements. No significant irregularities appeared in the natural rubber data. The probable occurrences of these climatic variables are crucial in determining the oil palm regular and sufficient levels of rainfall required for oil palm and natural rubber. Climate southern Thailand risks were less for growing natural rubber. This study concluded that natural rubber was a more climatically suitable crop for Nakhon Si Thammarat province if only the four stated climatic variables were considered. 2017 Kasetsart University. Publishing services by Elsevier . This is an open access article under the CC BY-NC-ND license http .

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