Extension workers in developing areas often fail to understand the reluctance of farmers to accept well-intentioned changes. This may be due to a lack of understanding of the communities' strict labour pattern, assigning each kind of labour according to tradition or sex, or of the social aspects which may lead to an over-estimation of available time for extra labour. It is concluded that: (1) unknown new kinds of labour are more easily acceptable than changes in traditional ones, (2) schemes

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... mising more results with the same or less labour, such as the cultivation of perennial crops or the use of selected seed, are easier to reanze than schemes dependent on much more work. T.A. mod. (Abstract retrieved from CAB Abstracts by CABI's permission)