Composition represent flora society formation in a[n forest community or percentage a[n type and individual to other type in a[n flora society. Type composition require to study to know value of compiler birchs a[n strightened upon which consideration need or its[his] [do] not a[n defended strightened. ( Istomo, 1933; Fauzi, 1996 in Soerianegara and of Indrawan, 2002).
Danserau ( 1957) in Bratawinata ( 1998) expressing that such with structure [is] a[n arrangement of room by tree individual which is on finally form strightenedly is. Furthermore [of] Kershaw ( 1973) in Bratawinata ( 1998) expressing that structure consist of 3 ( composition tiga) that is :
a. Vertical structure : High Example [of] [of] tree coronet coat and tree or is strightened.
b. structure of Horizontal : Spreading of types and spreading of tree.
c. Quantitative structure : Amount ( many or a few/little) type in community.
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