Its 2 sources are diffusion downward from the mixed layer and lateral expansions outcropping strata ( poleward ); it contains about 58 % of the total tritium.
12.
The FRP wrap works by restraining the lateral expansion of the column, which can enhance confinement in a similar manner as spiral reinforcement does for the column core.
13.
Depending on the specific tissue, auxin may promote axial elongation ( as in shoots ), lateral expansion ( as in root swelling ), or isodiametric expansion ( as in fruit growth ).
14.
A less mechanistic growth and competition model, called the Conductance Model, has been developed, mainly at Warwick-HRI, Wellesbourne, UK . This model simulates light interception and growth of individual plants based on the lateral expansion of their crown zone areas.