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extension programs
✖
[remove]
8
test plots
✖
[remove]
8
extension
6
demonstrations
5
farmers
4
extension services
3
on-farm research
3
diffusion
2
extension methods
2
participation
2
roles
2
Africa
1
Australia
1
Guinea
1
Iran
1
Vietnam
1
adoption
1
agricultural development
1
agriculture research
1
development
1