Preposition: of

• tree: On a 10 % moisture basis, the bark contains 7.2 % tannin and the heartwood of young trees 5.7 % .

• larch: Wooden posts Wooden posts should be made of hardwood, pressure treated softwood, or the heartwood of larch.

Converse of object

• decay: Wet decaying heartwood Heartwood is the dead material at the center of a tree or branch.

• have: The timber has a rich red heartwood similar in color to mahogany and is seldom stained.

• expose: A huge crack had opened up along the length of the trunk exposing the pale heartwood.

• rot: Lowland Wood Pasture, Parkland & Mature Trees Mature trees are those which are old enough to be hollow or contain rotting heartwood.

• become: The key lies in the way in which growth rings change from being juvenile sapwood to becoming mature heartwood in later life.

• use: He has used only the heartwood of the oak trunk for this sculpture, the sap wood having been cut away.

Adjective modifier

• brown: It has light yellow sapwood and a brown heartwood.

• red: The timber has a rich red heartwood similar in color to mahogany and is seldom stained.

• soft: On decayed, soft heartwood of holly in Quercus petraea wood.

Modifies a noun

• constituent: Heartwood constituents of Tetraclinis articulata ( Vahl ) Masters.

• age: Concentrations of oak lactones appear to increase with heartwood age and are also very variable between trees.

• decay: Lignin content of larch species determined the level of heartwood brown-rot decay [ 5 ] .