No; but he can be used to penetrate the people of the community he leads, to make the job easier for the extension agent.
He can serve as a translator in a case of language differences when he is enlightened and considers the innovation brought by the extension agent important and needful for himself and subjects.
He can also be used as a feedback mechanism to know how the farmers there are complying to the newly introduced innovation when visiting or speaking to each everyone of them is not feasible.
Therefore, A rural leader cannot replace a extension worker but can only be a medium of making his job easier.
@ Ahmed, I dont think as extension agents were using local communication strategies such as folk tales, town criers, songs, and dance to deliver extension services to farmers; as well as other methods—such as demonstrations, group discussion, formal lectures, radio, workshops, and agricultural shows etc. which local leader cant do.
To complement, I can say yes but to replace, no. Some rural community leaders are also knowledgeable in farming. They can in one way or another influence farmers in his area to adopt more appropriate practices. To add, some areas in the developing countries have very limited extension workers resulting in some rural leaders to step up.
As mentioned by others, it will be very difficult to handle both the tasks by a single person. Doing both roles at the same time will definitely have a negative impact on the quality of service.
A local leader in the rural area cannot replace an Agricultural Extension Worker but complement. An extension worker has technical skills which he/ she acquires through college training. Local leaders have hands on experience.