Literature review is a comprehensive survey of the work published in a particular field of study or line of research, usually over a specific period of time, in the form of an in-depth, critical bibliographic essay or annotated list in which attention is drawn to the most significant work. This review will examine previous and current studies dealing with the events that have influenced the economic problems of Nigerian farmers. The review covers such area as: The concept of agricultural information, information generation output and types, information needs and assessment, users of agricultural research information, sources and access to agricultural information, the concept of information flow and the challenges/barriers of information dissemination were all reviewed.
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Sani et al. (2014) studied this question.