The kernels are picked up from the ground after the ripe fruit has detached from the tree and forest animals have taken care of the pericarp, or harvested when ripe and the pericarp manually removed. As the nut shrinks when it hardens a small hollow cavity can form in the center.
Harvesting involves gathering kernels that have fallen to the ground after the fruit has matured and separated from the tree, with forest animals handling the outer layer. This process also involves collecting ripe kernels and removing the outer layer manually. As the nut hardens, a small cavity can develop in its center.