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- Taiwan (Republic of China)[remove]6
- extension services[remove]6
- extension systems4
- India3
- extension programs3
- Indonesia2
- Pakistan2
- Philippines2
- development2
- farming systems research2
- research organizations2
- rural development2
- training and visit system2
- Malawi1
- Nepal1
- Nigeria1
- Thailand1
- adoption1
- case studies1
- credit1