Dear Kilan,

You may have to provide some basic data alongwith your question.

1) What is the terrain slope

2) What is the average buttress height of the trees?

Thanks

Dear Subrata,

thank you for your reply. I am afraid the data bank i am working with can't provide these informations. given is the amount of ha of the different areas, total basal area, hight, total merchable volume. 

Best regards 

Dear Subrata,

volume= G * h* F

where G=basimetric area

h=average height

F= reduction coefficient, depending on specie, dimensions, etc,

For exemple with F=0,5 (common value for coniferous stands)

V=35*12*0,5 = 210 m3/ha