The knowledge behind the practice of building the daldal is now known to all male members of the community, but some Irob men are regarded as more skilful than others in adapting and improving the daldal and in experimenting with different ways of using the niches that they have created for crop, grass and treeproduction.
Dr Ray said that more research was needed in order to understand the underlying mechanism and identify what advantages the production of "reaction wood" offered to naturally growing tree.