The author concludes that vocational training in agriculture _____ .

Agriculture remains the most crucial area for
development, here it seems that the most intractable
problems of resistance to change exist. One may argue
that scientific training in agriculture by itself is unlikely to
have any marked impact on agricultural output. Any
attempt at vocational training in agriculture presupposes
that a meaningful structure of incentive exists for the
individual farmer to increase his output, improve his
techniques, and expand his range of activities. Without
such incentives and opportunities, agricultural education
can have little impact.