ABSTRACT
Evaluations of the productivity of cropping systems or of different crops should be done in quantitative terms. If the product, and the resources used can be defined, the evaluation can be based on total production and the amount of resources used. Before the productivity of a cropping system can be assessed, the basis upon which the yield will be measured must be decided. In multiple cropping systems, however, because of the different species, direct comparisons cannot be made and the productivity can only be assessed using a common denominator. The productivity of a multiple cropping system can best be evaluated using the yields of monocultures of the species in the system as the common denominator. Multiple cropping evaluation demands techniques by which many types of crops and crop sequences can be tested under varying environments. Most statistical procedures developed for evaluating agricultural systems are primarily designed for monocultures.
