| ลำดับที่ | LC |
คำอธิบาย |
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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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Organic farming. Organiculture |
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Special classes of lands and reclamation methods Including woodlands, burning of lands, deserts, saline environments, moors |
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Soil conservation and protection |
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Fertilizers and improvement of the soil |
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Farm machinery and farm engineering |
| [แสดง 9/9 รายการ] |