| ลำดับที่ | LC |
คำอธิบาย |
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Agriculture (General) |
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Documents and other collections |
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Agricultural missions, voyages, etc. |
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History |
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Agricultural education |
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Research. Experimentation |
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Agricultural extension work |
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Historic farms |
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Exhibitions. Fairs |
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Farm economics. Farm management. Agricultural mathematics Including production standards, record keeping, farmwork rates, marketing |
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Agricultural chemistry. Agricultural chemicals |
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Agricultural physics Including radioisotopes in agriculture |
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Agricultural ecology (General) |
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Agriculture and the environment |
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Plant growing media. Potting soils |
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Soils. Soil science Including soil surveys, soil chemistry, soil structure, soil-plant relationships |
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Agricultural meteorology. Crops and climate |
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Methods and systems of culture. Cropping systems Including fallowing, rotation of crops, plowing |
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Agricultural conservation |
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Melioration: Improvement, reclamation, fertilization, irrigation, etc., of lands |
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