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- extension[remove]3
- extension systems[remove]3
- development issues2
- Peru1
- crops1
- developing nations1
- diffusion of information1
- economic development1
- education programs1
- education systems1
- educational needs1
- extension programs1
- extension services1
- farmer needs1
- history1
- indigenous knowledge1
- information dissemination1
- information issues1
- land-grant university1
- nongovernmental organizations1