Definition
Bearing trees/hills/vines are those that have borne fruit regardless of age; they may or may not have borne fruit during the reference period.
Non-bearing trees are those trees which have never borne fruit, regardless of age.
Trees/hills/vines of productive age are those that are already capable of bearing fruits. Crops that have already reached the bearing age but did not have any yield during the reference period due to climatic condition or other similar reasons are considered productive. Old trees, which are no longer productive and those trees whose branches have been destroyed and hence will not bear fruit anymore are not counted in this category. (2002 Census of Agriculture Enumerator's Manual and World Programme for the 2010 WCA: FAO 2005)