Advisory work, by its very nature, is an intermediary between the re­ search worker and those who apply the results of his research. The challenge of advisory work is to devise means of and find pathways for transmitting research results to the user, overcome the reluctance of the latter to change, and often combine novel ideas with well-estab­ lished traditions. Nowhere is this challenge greater than in farming. This is especially true in developing countries, where the gap in the educational level between research workers and farmers may be ex­ tremely wide. Moreover, village-level advisers are often overburdened with non-professional functions and are not sufficiently backed