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- productivity[remove]17
- research[remove]17
- extension7
- agriculture research5
- agricultural research4
- economics4
- economics of information3
- rural development3
- value of information3
- agricultural development2
- development2
- education effects2
- evaluation2
- extension services2
- farmers2
- information technology2
- knowledge2
- public attitudes2
- research communication2
- rice2