Ключевые слова: analysis, apprenticeship, blight, cooperation, disctrict forester, environmentalism, fj, forest, forest development, forest district, forest enterprise, forest work, forest worker, forester, forestry, fungal infection, group, inspection tour, jaw, learn, lumber, man, nature, nature conservation, pest, pest infestation, recognize, silviculture, sustainability, sustained, timber harvesting, trainee, tree, tree damage, tree disease, tree population, trunk,