Its main branches are-
1 Extraction, felling, conversion and transport
2. Storage and marketing
3. Properties of wood, derived products, wood improvement and uses of wood.
The total volume of usable rough timber from the average tree is therefore only 37-52% depending on spps. region and local conditions.
Greatest wastage in felling & conversion in Himalayan coniferous forest such as fir (Abies pindrow), spruce (Picea smithiana), deodar and pines. The wastage in conversion of teak, Sal is generally small.
Major F.P such as timber, poles and firewood.
Minor F.P i.e. all F.P other than major (grasses, fruits, leaves, animal products, soil and minerals)
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