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Term Main definition
Daily Rated Capacity

The maximum volume of output that a mill can produce in one shift of 8 hours based on the actual performance of the machinery/ equipment. Sometimes referred to as true rated capacity.

Synonyms - DRC
damaged tree

Any tree injured beyond the tolerable limit.

Synonyms - damaged residual

Deterioration caused by wood destroying fungi.


Any irregularity or imperfection in a tree, log piece, product, or lumber that reduces the volume of sound wood or lowers its durability, strength, or utility value.


The loss, shredding or removal of leaves from a tree or other plant especially prematurely.


The conversion of forest to another land use or the long-term reduction of the tree canopy cover below the minimum 10% threshold.


A decline in the productivity of an area of land or in its ability to support natural ecosystems or types of agriculture.


A visible separation between plies of veneer or wood assembly due to adhesive failure.


The progressive destruction of a vegetative cover that will lead in formation of dry land condition.


Small pieces of dead and decomposing plants and animals detached and broken down organic fragments or structure, small organic particles such as leaves and twigs.

diameter above buttress

The diameter of a standing tree measured at 0.3 meter from the highest buttress.

diameter-at-breast height

The diameter of the stem of a standing tree measured of 1.3 meters from the higher ground. DBH usually implies diameter outside bark (DOB) but can be measured as inside bark (DIB).

Synonyms - DBH,diameter breast high
Dipterocarp forest

A forest dominated by at least 50% Dipterocarp species.

domestic water

A portion of runoff water intended for domestic and industrial uses.

dominant trees

Trees with crowns extending above the general level of the crown cover and receiving full light from above and from the sides: larger that the average trees in the stand with crowns well-developed.