The purpose of this research is to study the effective factors on cash holdings in private and state companies quoted in Tehran stock exchange. Time period of this research is 2007-2012, and a number of 134 companies (85 private companies and 49...

: Procurement of farm power and machineries .In new systems of agriculture must be more attention to relation of nature, man and machine and also preferred to put emphasis on agricultural mechanization. In this case agricultural mechanized services companies can...