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Subject Term
- Iowa, USA[remove]74
- farmers14
- extension11
- information sources9
- farm journals8
- history7
- adoption6
- communication6
- extension agents6
- farmer needs6
- media use6
- surveys6
- extension education5
- extension programs5
- farm management5
- farmer attitudes5
- farmer perceptions5
- information dissemination5
- soil conservation5
- sustainability5