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- extension communication[remove]5
- test plots[remove]5
- demonstrations3
- extension3
- farmers3
- on-farm research3
- extension agents2
- extension methods2
- information sources2
- research communication2
- Australia (Oceania)1
- Burkina Faso1
- agriculture research1
- diffusion1
- extension programs1
- extension research1
- farm tours1
- farming methods1
- farming systems research1
- field days1