1. Without biofuel production, existence of a negative long-term oil-price effect on corn2. hout biofuel production, existence of a positive on rapeseed as well as weak and positive on wheat and soybean3. Biofuel production has led to the long-term oil-price effect increase on all agricultural commodities studied4. Necessary to be careful with biofuel production in the case of oil price increase5. Necessary to investigate the second-generation biofuel impact before its production development.
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