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ลำดับที่	LC	คำอธิบาย
41		Landscape gardening. Landscape architecture
42		Parks and public reservations Including theory, management, history
43		Pests and diseases
44		Individual or types of plants or trees
45		Weeds, parasitic plants, etc.
46		Poisonous plants
47		Plant pathology
48		History
49		Economic entomology
50		Pest control and treatment of diseases. Plant protection
51		Pesticides
52		Soil disinfection
53		Organic plant protection. Biological control
54		Inspection. Quarantine
55		Economic zoology applied to crops. Agricultural zoology Including animals injurious and beneficial to plants
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