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Paleobotany of particular jTcof,naphic régions. 

 Zoology. 

 Agriculture. 

 Général. 



Farm management. 



Farm architecture. 



Dictionnaries and cyclopaedias. 



Essays, collected addresses, etc. 



Periodicals. 



Societies, transactions and proceedings. 



Study and teaching, agricuitural collèges, etc. 



Government and state publications. 



History. 



Soil, its nature and properties, soil geology. 



Soil chemistry. 



Tillage (breaking, plowing, subsoiling). 



Drainage. 



Réclamation. 



Irrigation, ground water. 



Conservation of moisture. 



Drought, rainfall. 



Fertilizers. 



Goods roads and agriculture. 

 Insects, plant diseases, weeds. 

 Bénéficiai insects. 

 Harmful insects. 

 Affecting plants. 



Repression, insecticides, fungicides. 

 Insect parasites and diseases. 

 Diseases of agricuitural plants. 

 Weeds. 



Poisonous plants. 

 Field crops. 



Grain crops or cereals. - Rice. - Cotton. - Fiber crops. - Alkaloidal plants 

 (tobacco, tea, coffee, cocoa, poppy). _ Forage crops. - Grasses. - Forage 

 crops. Légumes. - Root crops used as field crops. ^ Sugar-^ ielding pianrs. 

 Horticulture. 

 General. 



Culture. - Germination. - Propagation. - Planting and transplanting. - Traininc 

 cuttmg, prunmg and minor treatment. - Spraying and treatment for insects' 

 and diseases. - Protection from weeds and poisonous plants. - Forcincx 



Plant breeding (See 5751.078 and 5S11.60J7): Acclimatization. - Crossing and hvbri- 

 dizmg. — Sélection. 



