organicfarming高一英语课件
日期：2010-08-06 08:59
SueJillfromSuichangHighSchoolsafefoodgreenfood≈organicfoodsafeornot?growingcropswithnaturalfertilizersratherthanchemicalfertilizersSkimming:Whatis?organicfarmingScanning（groupwork）:Whyarenaturalfertilizersbetter?Whatproblemsarecausedbyusingchemicalfertilizers?3Whatspecialwaysoffarmingdoorganicfarmersuse?4Whydothefarmersdoso?Whyarenaturalfertilizersbetter?2Whatproblemsarecausedbyusingchemicalfertilizers?Scanning（groupwork）:UsenaturalfertilizersTomakethesoilricherChangecropsevery2Topreventthesoilfromor3yearsgettingexhaustedGrowcropsthatneedTopreventwindorwaterdifferentlevelsofthefromcarryingawaythesoilinbetweensoil3Whatspecialwaysoffarmingdoorganicfarmersuse?ThereisabigpieceoffieldnearyourschoolTheschoolisplanningtogrowsomegreenfoodinthefieldMakeaplanwithyourgroupmembers:Whatgreenfoodtogrowandwhy?Howtodevelopthesoil?Whatspecialwaystogrowit?Whatspecial，
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