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SPECIES VARIETIES AND GEOGRAPHIC
GENETIC IMPROVEMENT OF EXOTICS
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adapted areas Australia Brazil breeding camaldulensis climates clones Colombia conifers countries damage developed diseases Douglas-fir elliottii Eucalyptus camaldulensis Eucalyptus grandis example exotic environment exotic forest trees exotic forestry exotic plantations exotic species exotic trees factors fertilization flowering frequently gene conservation genotypes Gmelina Gmelina arborea growing exotics grown growth hardwoods harvesting hondurensis hybrid important indigenous species insects interaction IUFRO juvenile wood kesiya Ladrach land race lodgepole pine major moisture monoculture mycorrhizae nances Nikles nursery nutrient occur pests Pinus caribaea Pinus caribaea Pinus Pinus contorta Pinus oocarpa Pinus patula Pinus radiata planting populations potential problems provenances pruning pulp radiata pine rainfall root rotations Scots pine seed orchards seed production seed source seedlings selection silvicultural soil sometimes South Africa spruce Sweden temperate tests thinning timber tolerance tree species tropical pines usually variation vegetative propagation wood density wood properties Zealand Zobel and Talbert