| ลำดับที่ | LC |
คำอธิบาย |
| 1 |
|
Agricultural meteorology. Crops and climate |
| 2 |
|
Methods and systems of culture. Cropping systems Including fallowing, rotation of crops, plowing |
| 3 |
|
Agricultural conservation |
| 4 |
|
Melioration: Improvement, reclamation, fertilization, irrigation, etc., of lands |
| 5 |
|
Organic farming. Organiculture |
| 6 |
|
Special classes of lands and reclamation methods Including woodlands, burning of lands, deserts, saline environments, moors |
| 7 |
|
Soil conservation and protection |
| 8 |
|
Fertilizers and improvement of the soil |
| 9 |
|
Farm machinery and farm engineering |
| [แสดง 9/9 รายการ] |