The farming company founded in 1987, El Tejar, who has become one of the biggest grain and oilseed producers globally, has relocated their headquarters from their original base in the province of Buenos Aires to São Paulo. Among the world’s top grain producers in 2012, the company have now also almost replaced their Argentina chief executive, Horacio Ackerman, with Brazilian Luiz Kaufman. The changes come as a result of a disintegrating relationship between the Argentine government and the farming industry…