Forestry Terms - J -
J-ROOT or L-ROOT - An improperly planted seedling that takes a J-shaped configuration in the planting hole. Such seedlings often die prematurely, grow poorly, and are susceptible to windthrow.
JUVENILE WOOD -Inner core of xylem surrounding the pith. The cells are smaller and less
structurally developed than those of the outer xylem. The time during which juvenile wood
is formed is termed the juvenile period. This period varies among individuals, with
species, and with environmental conditions .