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- on-farm research[remove]139
- participation63
- farmers59
- farming systems research51
- extension37
- linkages27
- agriculture research24
- agricultural research20
- extension programs20
- extension communication19
- farming methods19
- agricultural development18
- farmer needs18
- rural development17
- technology transfer16
- cooperation15
- extension systems15
- research15
- scientists13
- farming systems12