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Subject Term
- extension methods[remove]16
- extension13
- extension communication10
- extension programs6
- extension services6
- extension systems5
- farming systems research4
- farmers3
- farming methods3
- farming systems3
- history3
- on-farm research3
- roles3
- Sudan2
- agricultural development2
- education methods2
- educational media2
- extension education2
- financial management2
- linkages2