Foreword
Scope
Principal divisions of UDC 63
Related subjects
Auxiliary signs and subdivisions
Typographic presentation
Cooperating organizations
Schedule
630 Forestry
630*1 Factors of the environment. Forest biology
630*2 Silviculture
630*3 Work science (work studies). Harvesting of
        wood. Logging and transport. Forest
        engineering
630*4 Forest injuries and protection
630*5 Forest mensuration. Increment.
        Development and structure of stands
630*6 Forest management. Business economics of
        forestry. Administration and organization
        of forest enterprises
630*7 Marketing of forest products. Economics of
        forest transport and the wood industries
630*8 Forest products and their utilization
630*9 Forests and forestry from the national point
        of view (forest policy). Social economics of
        forestry
631/635 Farm management. Agronomy. Horticulture
631 Agriculture in general
631.1 Farm management and organization
631.2 Farm buildings, structures and installations.
        Buildings for livestock, agricultural products,
        machinery and equipment
631.3 Agricultural machines, implements and equipment
631.4 Soil science. Soil research
631.5 Agricultural operations
631.6 Rural engineering. Land reclamation. Drainage
        Irrigation
631.8 Fertilizers and manures. Growth substances
632 Plant damage. Plant injuries. Plant diseases.
        Plant pests. Plant protection
632.1 Non-parasitic diseases. Diseases of complex
        origin
632.2 Symptomatology
632.3 Bacterial and virus diseases of plants
632.4 Fungal diseases of plants. Mycology.
632.5 Injurious plants
632.6 Plant pests (other than insects)
632.7 Insect pests. Insecta
632.8 Other plant injuries. Injuries due to unknown
        causes
632.9 Control of plant diseases and pests
Alphabetical subject index