factors affecting technical efficiency the sugar beet producers in kermanshah province

in order to study effective factors in sugar beet production using two stage cluster sampling, totally one hundred producers were selected from kermanshah and islamabad cities in kermanshah province. data were collected through interviews and  filling out questionnairs for crop season 1999-2000. evaluation of technical efficiency of sugar beet producers and  its  effective factors was carried out using cob-douglas productions functions and maximum likelihood method. results showed that average rate of technical efficiency of  farmers was 82 percent in kermanshah  and  77 percent in islamabad. the effects of the number of fields, previous year culture, fertilizer usage based on soil analysis, time of the last irrigation, culture method and reading extension materials were evident on sugar beet producer technical efficiency.