| Tilling Unit | Required Hours | Machinery Input (kcal) | Petroleum Input (kcal) | Hour/Day | Working Human/Hour Input (kcal) | Human Daily Energy Input (kcal) | Total Human Input (kcal) | Oxen Energy Input (kcal) | Total Input (kcal) |
| Human Power | 400 | 6000 | 0 | 10 | 400 | 5400 | 216,000 | 0 | 222,000 |
| Oxen (pair) | 65 | 6000 | 0 | 10 | 375 | 5150 | 33,500 | 260,000 | 299,500 |
| 6-HP Tractor | 25 | 47,500 | 237,600 | 10 | 200 | 3400 | 8500 | 0 | 293,600 |
| 50-HP Tractor | 4 | 61,300 | 306,300 | 4 | 200 | 3400 | 1360 | 0 | 368,900 |