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[ เกษตรศาสตร์ ( Agriculture ) ]
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ลำดับที่
LC
คำอธิบาย
1
Agricultural education
2
Research. Experimentation
3
Agricultural extension work
4
Historic farms
5
Exhibitions. Fairs
6
Farm economics. Farm management. Agricultural mathematics Including production standards, record keeping, farmwork rates, marketing
7
Agricultural chemistry. Agricultural chemicals
8
Agricultural physics Including radioisotopes in agriculture
9
Agricultural ecology (General)
10
Agriculture and the environment
11
Plant growing media. Potting soils
12
Soils. Soil science Including soil surveys, soil chemistry, soil structure, soil-plant relationships
[แสดง 12/12 รายการ]