The use of standard man-days is based on the reduction of all types of production on a farm to their standard labour requirements. This ignores variations in efficiency of different farmers as well as the effects of scale economies. It is possible to produce ‘standard’ figures on how many days of work-per annum are required in cultivating a unit area of a given crop. In this way, labour-intensive crops can assume a much greater importance in any classification based on standard man-days. Using standard man-day conversions, farming activities involving livestock production can also be incur-porated in classification. However, Weaver et al. (1956) concluded that there was no suitable statis-tical method to enable them to combine both crops and livestock in a single index to create a map of farming regions. Hence other methods have been applied in establishing type-of-farming regions.