Heartwood formation in black walnut and black cherry was studied in relation to tree age, size, and growth, rate, vertical position in tree, morphological characteristics of heartwood-sapwood transition zones, between-tree and between-stand variation, and the broad organizations of physiological control over the process. Variability data, the concept of temporal and spatial control of xylem parenchyma senescence, and tentative genetic selection criteria were derived to aid hardwood geneticists and silviculturists.
|Original language||English (US)|
|Journal||US For Prod Lab Res Pap|
|State||Published - Jan 1 1976|