The first varietal selections were made in 1930. Quite unavoidably they
were chosen solely by what could be judged from the nuts with no
knowledge of the bearing habits of the parent trees. These were first
grafted in 1932 and first catalogued in 1935. Already by 1946, some had
been supplanted by others of greater promise. Few grafted trees have
been brought into bearing and with minor exceptions, it has not been
possible to obtain bearing records. It is, however, mainly with the
grafted tree that the future of the industry is expected to be built up.