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

摘要: Abstract Four climatic variables—rainfall, number of rainy days, relative humidity, and temperature—were studied to observe the characteristics probable occurrences outside required bounds for optimal growth oil palm natural rubber. These two economic crops have become increasingly popular among farmers in Nakhon Si Thammarat province, southern Thailand. Monthly annual data during 1981–2011 were analyzed using appropriate time-series techniques. The out-of-bound probabilities calculated counting method. Only rainfall showed a significant increasing trend while trends other variables not significant. All seasonal fluctuation cyclical movements. No irregularities appeared data. these are crucial determining regular sufficient levels Climate risks less growing This study concluded that rubber was more climatically suitable crop if only four stated considered.