First, find out major and minor nutrients, water and other requirements of sugar beet crop.
Second find out area or sites best suited for cultivation of sugar beet in terms of climate and soil.
Third, study sugar beet crop management practices in your country.
Third, study sugar beet crop management practices of countries which are famous for higher production of sugar beet.
Fourth, develop a plan of the best practices a mixture of practices in your country and those which can be adopted in your country.
I hope, if all these steps are carried out with rigour and example is set more and more farmer in favourable climate condition will adopt these practices due to commercial benefits demonstrated by few farmers adopting your suggested best management practices.
Like Demetris posted: You need a lot of water during the vegetative phase and moderate temperatures. I don´t know your conditions in Iran. Besides lots of water you need deep soil with a lot of minerals.
Post is about to "find the best way to increase the production and development of sugar beet cultivation in the Middle East, especially Iran". Obviously, sugar beet might have been produced there with low yield. Not only water but soil is also an important factor as some soils have high water retention capacity, so less irrigation water,