LIBRARY OF CONGRESS CLASSIFICATION OUTLINE 

CLASS S - AGRICULTURE

(Click each subclass for details) 

Subclass S Agriculture (General)

Subclass SB Plant culture

Subclass SD Forestry

Subclass SF Animal culture

Subclass SH Aquaculture. Fisheries. Angling

Subclass SK Hunting sports
Subclass S 

S1-(972) Agriculture (General)

S21-400.5 Documents and other collections

S403 Agricultural missions, voyages, etc.

S419-482 History

S530-559 Agricultural education

S539.5-542.3 Research. Experimentation

S544-545.53 Agricultural extension work

S548-548.6 Historic farms

S550-559 Exhibitions. Fairs

S560-571.5 Farm economics. Farm management. Agricultural mathematics

Including production standards, record keeping, farmwork 

rates, marketing 

S583-587.73 Agricultural chemistry. Agricultural chemicals 

S588.4-589.6 Agricultural physics 

Including radioisotopes in agriculture 

S589.7 Agricultural ecology (General) 

S589.75-589.76 Agriculture and the environment 

S589.8-589.87 Plant growing media. Potting soils 

S590-599.9 Soils. Soil science 

Including soil surveys, soil chemistry, soil structure, 

soil-plant relationships 

S600-600.7 Agricultural meteorology. Crops and climate 

S602.5-604.37 Methods and systems of culture. Cropping systems 

Including fallowing, rotation of crops, plowing 

S604.5-604.64 Agricultural conservation 

S604.8-621.5 Melioration: Improvement, reclamation, fertilization, irrigation, 

etc., of lands 

S605.5 Organic farming. Organiculture 

S606-621.5 Special classes of lands and reclamation methods 

Including woodlands, burning of lands, deserts, saline 

environments, moors 

S622-627 Soil conservation and protection 

S631-667 Fertilizers and improvement of the soil 

S671-760.5 Farm machinery and farm engineering 

S770-790.3 Agricultural structures. Farm buildings 

S900-(972) Conservation of natural resources 

Including land conservation 
Subclass SB 

SB1-1110 Plant culture

SB39 Horticultural voyages, etc.

SB71-87 History

SB107-109 Economic botany 

SB109.7-111 Methods for special areas

Including cold regions, dry farming, tropical agriculture 

SB112 Irrigation farming 

SB113.2-118.46 Seeds. Seed technology 

SB118.48-118.75 Nurseries. Nursery industry 

SB119-124 Propagation 

Including breeding, selection, grafting, air layering 

SB125 Training and pruning 

SB126 Artificial light gardening 

SB126.5-126.57 Hydroponics. Soilless agriculture 

SB127 Forcing 

SB128 Growth regulators 

SB129-130 Harvesting, curing, storage 

SB169-172.5 Tree crops 

SB175-177 Food crops 

SB183-317 Field crops 

Including cereals, forage crops, grasses, legumes, root crops, 

sugar plants, textile plants, alkaloidal plants, medicinal 

plants 

SB317.5-319.864 Horticulture. Horticultural crops

SB320-353.5 Vegetables

SB354-402 Fruit and fruit culture

SB381-386 Berries and small fruits

SB387-399 Grape culture. Viticulture

SB401 Nuts

SB403-450.87 Flowers and flower culture. Ornamental plants

SB406.7-406.83 Plant propagation

SB409-413 Culture of individual plants

SB414 Forcing

SB414.6-417 Greenhouses and greenhouse culture

SB418-418.4 Container gardening

SB419-419.3 Indoor gardening and houseplants

SB419.5 Roof gardening. Balcony gardening

SB421-439.8 Classes of plants

Including annuals, climbers, ferns, lawns, perennials, 

shrubs 

SB441-441.75 Flower shows. Exhibitions 

SB442.5 Care and preparation of cut flowers and ornamental plants for 

market 

SB442.8-443.4 Marketing. Cut flower industry. Florists 

SB446-446.6 Horticultural service industry 

SB447 Preservation and reproduction of flowers, fruits, etc. 

SB447.5 Bonkei. Tray landscapes 

SB449-450.87 Flower arrangement and decoration 

SB450.9-467.8 Gardens and gardening 
SB469-(476.4) Landscape gardening. Landscape architecture 

SB481-486 Parks and public reservations 

Including theory, management, history 

SB599-990.5 Pests and diseases 

SB608 Individual or types of plants or trees 

SB610-615 Weeds, parasitic plants, etc. 

SB617-618 Poisonous plants 

SB621-795 Plant pathology 

SB818-945 Economic entomology 

SB950-990.5 Pest control and treatment of diseases. Plant protection 

SB950.9-970.4 Pesticides 

SB973-973.5 Soil disinfection 

SB974-978 Organic plant protection. Biological control 

SB979.5-985 Inspection. Quarantine 

SB992-998 Economic zoology applied to crops. Agricultural zoology 

Including animals injurious and beneficial to plants 
Subclass SD 

SD1-669.5 Forestry

SD11-115 Documents

SD119 Voyages, etc.

SD131-247.5 History of forestry. Forest conditions

SD250-363.3 Forestry education

SD388 Forestry machinery and engineering

SD388.5 Tools and implements

SD389 Forest roads

SD390-390.43 Forest soils

SD390.5-390.7 Forest meteorology. Forest microclimatology

SD391-410.9 Sylviculture

SD411-428 Conservation and protection

Including forest influences, damage by elements, fires, 

forest reserves 

SD430-(559) Exploitation and utilization 

Including timber trees, fuelwood, logging, transportation, 

valuation 

SD561-669.5 Administration. Policy 
Subclass SF 

SF1-1100 Animal culture

SF41-55 History

SF84-84.64 Economic zoology

SF84.82-85.6 Rangelands. Range management. Grazing

SF87 Acclimatization 

SF89 Transportation

SF91 Housing and environmental control

SF92 Equipment and supplies

SF94.5-99 Feeds and feeding. Animal nutrition

SF101-103.5 Brands and branding, and other means of identifying

SF105-109 Breeding and breeds

SF111-113 Cost, yield, and profit. Accounting

SF114-121 Exhibitions

SF170-180 Working animals

SF191-275 Cattle

SF221-250 Dairying

SF250.5-275 Dairy processing. Dairy products

SF277-360.4 Horses

SF294.2-297 Horse sports. Horse shows

SF304.5-307 Driving

SF308.5-310.5 Horsemanship. Riding

SF311-312 Draft horses

SF315-315.5 Ponies

SF321-359.7 Racing

SF360-360.4 Feral horses. Wild horses

SF361-361.73 Donkeys

SF362 Mules

SF371-379 Sheep. Wool

SF380-388 Goats

SF391-397.83 Swine

SF402-405 Fur-bearing animals

SF405.5-407 Laboratory animals

SF408-408.6 Zoo animals

SF409 Small animal culture

SF411-459 Pets

SF421-440.2 Dogs. Dog racing

SF441-450 Cats

SF451-455 Rabbits and hares

SF456-458.83 Fishes. Aquariums

SF459 Other animals

SF461-473 Birds. Cage birds

SF481-507 Poultry. Eggs

SF508-(510.6) Game birds

SF511-511.5 Ostrich

SF512-513 Ornamental birds

SF515-515.5 Reptiles

SF518 Insect rearing

SF521-539.8 Bee culture

SF541-560 Sericulture. Silk culture
SF561 Lac-insects

SF600-1100 Veterinary medicine

SF756.5-769.5 Special preclinical sciences

Including veterinary genetics, ethology, anatomy, 

physiology, embryology, pathology 

SF780.2-780.7 Veterinary microbiology, bacteriology, virology, mycology 

SF780.9 Veterinary epidemiology. Epizootiology 

SF781-809 Communicable diseases of animals (General) 

SF810 Veterinary parasitology 

SF810.5-810.7 Predatory animals and their control 

SF811-909 Veterinary medicine of special organs, regions, and systems 

SF910 Other diseases and conditions 

SF910.5 Veterinary orthopedics 

SF911-914.4 Veterinary surgery 

SF914.3-914.4 Veterinary traumatology. Veterinary emergencies 

SF914.5 Veterinary acupuncture 

SF915-919.5 Veterinary pharmacology 

SF925 Veterinary physical medicine 

SF951-997.5 Diseases of special classes of animals 
Subclass SH 

SH1-691 Aquaculture. Fisheries. Angling

SH20.3-191 Aquaculture

SH33-134.6 By region or country

SH138 Mariculture

SH151-179 Fish culture

SH171-179 Diseases and adverse factors

SH185-191 Frogs, leeches, etc.

SH201-399 Fisheries

SH213-216.55 By oceans and seas

SH219-321 By region or country

SH327.5-327.7 Fishery resources. Fishery conservation

SH328-329 Fishery management. Fishery policy

SH334 Economic aspects. Finance

SH334.5-334.7 Fishery technology

SH334.9-336.5 Fishery processing

SH337 Packing, transportation, and storage

SH337.5 Fishing port facilities

SH343.2-343.3 Fishery oceanography. Fishery meteorology

SH343.4 Fishery research vessels

SH343.5 Exploratory fishing

SH343.8 Navigation

SH343.9 Safety measures

SH344-344.8 Methods and gear. Catching of fish

SH346-351 Fishery for individual species

SH360-363 Seal fisheries. Fur sealing

SH364 Sea otter

SH365-380.92 Shellfish fisheries. Shellfish culture

SH381-385 Whaling

SH387 Porpoises. Dolphins

SH388.7-391.5 Algae culture

SH393 Seagrasses

SH396 Sponge fisheries

SH400-400.8 Seafood gathering

SH401-691 Angling

Including tackle, casting, methods of angling, angling for 

special kinds of fish 
Subclass SK 

SK1-664 Hunting sports

SK37-39.5 Shooting

SK40-268 By country

SK281-293 Special methods and types of hunting

Including bolos, game calling, tracking, trapping, dressing 

SK284-287 Fox hunting 

SK291-292 Coursing 

SK293 Ferreting 

SK295-305 Big game 

SK311-335 Bird hunting. Fowling 

SK336 Varmint hunting (General) 

SK337 Predator hunting 

SK341 Other game 

SK351-579 Wildlife management. Game protection 

Including annual reports of game commissioners 

SK590-593 Wild animal trade 

SK650-664 Wildlife-related recreation