Characteristics of forestry(林业的特点)： (l)Production rotation is long(生产周期长) (2)Risk of production and management activities (fire,wind throw ect.)(生产和经营风险) (3)Products'mature age and benefit are full of variety(成果的 成熟期和效益的多样性) (4)Forest management is a social activity(Public good)(森林经 营的社会性和公益性) (⑤)Forest area is vast(面积辽阔)Characteristics of forestry(林业的特点): （1）Production rotation is long (生产周期长) （2）Risk of production and management activities (fire, wind throw ect.) (生产和经营风险) （3）Products’ mature age and benefit are full of variety (成果的 成熟期和效益的多样性) （4）Forest management is a social activity (Public good) (森林经 营的社会性和公益性) (5) Forest area is vast (面积辽阔)