Estimation of technical and environmental efficiency of dairy farms in Sarab County (Data envelopment analysis approach)

Increasing population and growing demand for dairy products and protein has led to paying more attention by policymakers in livestock sector on increasing efficiency.
The purpose of this study is measuring technical and environmental efficiency of dairy farms in Sarab County and determining effective factors influencing them.
Required data collected using simple random sampling and filling 51 questionnaires at year 1394. Using Data Envelopment Analysis, average technical, scale and environmental efficiency calculated 95%, 55% and 88%, respectively. The Kruskal-Wallis test used to the statistical comparison of the difference between technical and environmental efficiency;
confirm significant difference between them. Also, the result of Spearman's rank correlation coefficient show that the higher the technical efficiency of the farm, the less the pollution emitted and then the farm has high environmental efficiency.
Finally, education and milk yield per cow determined as the effective factors influencing the environmental efficiency of dairy farms.