Conservation and multiplication of the useful gene pool of forest trees by means of grafting.
Methods of grafting were established which gave up to 95% success rate. Conifers were multiplied by whip grafting and deciduous types by bud grafting. Local species were used as the stocks. The species multiplied included Picea morinda [P. smithiana], a form of P. pungens, P. abies, P. engelmannii, Abies firma, A. concolor, A. alba (and its weeping form), A. cilicica, A. pinsapo and various forms of Fagus sylvatica.