By the time this crop is harvested next year, the government hopes that the national congress will have passed a new law defining once and for all Brazil's policy on GM crops.
At the moment, Brazil is the only large agricultural exporter in the world which does not use GM seeds.
But environmental organisations want to keep it that way and are now expected to take the question to the courts, claiming that the presidential decree is unconstitutional.

BBC NEWS | Brazil gives way on GM seed