STraditional
 Maize


60 1- 7 Maize in twin rows
 I with potatoes


 70
Confidence
Coefficient

 80



 90 -



 100
 0 1 2 3 4 5 6

 Yield (mt/ha)


FIG.VII-8. Distribution of confidence intervals for
 maize yield, traditional maize versus maize
 in twin rows with potatoes.

and many alternative uses for this capital, there may be
sufficient risk to prevent widespread adoption of an
otherwise apparently good technology.
 The year following the farmer-managed test with this
technology, personnel from ICTA returned to interview
participating farmers to calculate an index of
acceptability for the technology (Table VII-6). Seven of
the nine farmers who provided usable data were interviewed
at this time. (To have more confidence in the index of
acceptability, the number of farmers included should be
greater.) Four of the seven (57%) were using the improved
system. However, they were using it only on 16% of the
land they had planted in maize, so the index of
acceptability was only nine. This indicates a fairly low
level of acceptability of the practice.