Rafael Mujica walks to work in a corn field in the expropriated Fundo Aracal in the state of Yaracuy, about 332 km (200 miles) west of Caracas August 27, 2007. Venezuelan President Hugo Chavez called for constitutional changes such as the removal of limits for the term of president, in order to extend his rule and consolidate his self-styled socialist revolution and also plans to forbid ownership of latifundia, or 'large estates'. His government has already moved to expand expropriations of farms deemed to be idle and put them in the hands of state-backed peasant cooperatives. Officials said they have seized 628 farms, representing 27percent of the country's idle land. Picture taken August 27. REUTERS/Jorge Silva (VENEZUELA)