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The conditions for obtaining the maximum gross yield of pine nuts on the grafting plantations have been considered. Nut production plantations are created in the most productive vegetative conditions (not lower than II-III quality class). The selection of areas was carried out on the basis of forest vegetation zoning, bioecological properties and climatic conditions. First of all, plantations are laid in the zone of ecological optimum, outside the natural range (zone of coniferous-deciduous forests of the European part of Russia). Valuable clone genotypes of Siberian cedar for seed and pollen productivity have been selected on graft plantations and in the archives of plus tree clones. Mixing of clones is carried out taking into account the reproductive differentiation of genotypes, providing a biologically possible output of full-grain seeds from the cone. Clones of various reproductive types and seed productivity are placed on the plantation in the absence of natural sources of pollination. Dates of flowering and pollen dispersion must be the same. The distance between the trees should ensure the yield increase with full crowns for at least 50-80 years. Maximum distance between high-yielding grafts and pollinating grafts is not more than 15 m.

Bioecological aspects of plantation nut cultivation of Siberian cedar (Pinus sibirica du tour.) in Russia