Soybean is one of the major booming oil crops in the world and is one of the products presently being used as biodiesel, with an increasing trend in response to the growing demand for biofuels, especially in the USA (Smaling et al., 2008). This is being driven by high and unstable fossil-fuel-derived energy prices. Several countries (e.g. Brazil and the USA) have created programmes for biodiesel development. As a result, a new market opened for soybean oil in Brazil in 2006/2007. In Brazil, the biodiesel programme has allowed the inclusion of 2% of biodiesel in diesel from petroleum since 2006. This proportion will become compulsory in 2008 and increase to 5% by 2013 (Smaling et al., 2008). In 2008, demand for vegetable oil for biodiesel was estimated at about 500,000 t (Smaling et al., 2008). It has also been estimated that the energy sector will absorb about 1.5-3.0 million t of vegetable oil by 2013 (Smaling et al, 2008).
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