agricultural futures and implications for environment defra is0209 appendix b demand estimates commodities including bio fuels appraisal of alternative farming systems provides topic papers that support the construction in main report therefore they contain important information on how silsoe whole farm model were obtained assumptions underpin these paper 9 a background review from various organisations future products thus reality check used 10 considers production defines their environmental economic effects while 11 reviews current biofuel industry crops is likely to change land use england wales b1 projected prices 21 st century 1 introduction will be dependent market forces several have attempted estimate conditions this document identifies sources brief outline content