| 1 | The grain was sown in drill. | |
| 2 | Test conditions for box type vertical drilling machines; | |
| 3 | Test conditions for pillar type vertical drilling machines; | |
| 4 | Finally, the elastic transformation using smooth thin- plate spline interpolation is performed. | |
| 5 | Chinese farmers were using seed drills as early as the 2nd Century BC. |