| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2012: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Outline of Final Research Achievements |
Field investigations were conducted to clarify water balance and on-farm irrigation efficiency of irrigation systems in the Chaophraya delta, Thailand, where multiple rice cropping is commonly practiced. The results indicated that double or triple rice cropping was materialized through achieving very high on-farm efficiency despite limited water supply in the dry season. It was also indicated that improved water access by increase in density of farm ditches and utilization of mobile pumps were the main factors for the high on-farm efficiency. This result proved that the concept of on-farm irrigation efficiency proposed by this study be useful for evaluation of irrigation systems. Further, it was considered important that development and extension of new high quality rice varieties provoked farmers' incentive for multiple cropping. Thus, the factors for realizing multiple rice cropping were clarified and the direction of improvement of on-farm irrigation systems was also suggested.
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