aplication of dea to estimate technical efficiency in iran forest nurseries (case study: 16 nurseries in the north)

forest nurseries in north are the main sources of seedlings production for forest organization and urban green spaces. for more produce and less cost should be done good management of the production operations.study included data from 16 nursery seedling production in the north. in this study land (an area of seedling land) and personnel (workers and employees) as an input and the number of seedlings product during years was output.technical nurseries calculated and evaluated. the results showed that among the 16 studied nurseries, pisesoon, ghorogh, kalardasht and talokola nurseries achieved the greatest efficiency with an average of 49.5%. for the same reason, the shahr posht, koloodeh and safrabasteh nurseries achieved a high efficiency with an average of 67.3%.the average of scale efficiency was71.7%.the low efficiency nurseries should follow the pisesoon nursery due to its greatest efficiency.the difference between the greatest and average efficiency is 32.7% so if we can reduce the difference to zero by increasing the technical efficiency, the amount of seedling production will be increase to 32.7% without use of production factors.