| Table 2 Yield per acre per year and equivalent caloric values from selected crops produced from 1974 to 1979. | ||||
| Crop | Average yearly yield (lb/acre) | Kilocalories/lb | Millions of kilocalories/acre | Day equivalents of energy/person/acre1 |
| Potato | 56222 | 1270 | 7.1 | 2380 |
| Rice | 3819 | 1460 | 5.6 | 1858 |
| Corn | 5413 | 1450 | 7.9 | 2616 |
| Soybean | 1798 | 1600 | 2.9 | 958 |
| Wheat | 1898 | 1470 | 2.8 | 930 |
| 1At rate of 3000 kilocalorics per day per person. 2Dry weight (22%). | ||||