yes there is a nice reason for farmers. they don't know how to read or write so they are being fooled in everything. If they know to read and write nobody can fool them and they can start earning profits. And can do any odd works in the evening to earn more money to their families and give comforts.
Adult education is just about educating the aged people who were not able to get education in their early ages. Its not that they can not do anything but it is just that they do not get a chance to do something. Some days before I heard about a perfect example which of an aged man ho studied and he was so talented that he did Master's in 7 subjects! Isn't it a perfect example..? So I think adult education is an opportunity to glow the potential of every aged and uneducated man..