Table 2.
Total weighted-global average WF for 10 crops providing ethanol and 3 crops providing biodiesel (m3/GJ), as well as their blue and green WF
| Crop | Total WF | Blue WF | Green WF | Total water | Blue water | Green water |
|---|---|---|---|---|---|---|
| Ethanol | m3 per GJ ethanol | L of water per L of ethanol | ||||
| Sugar beet | 59 | 35 | 24 | 1,388 | 822 | 566 |
| Potato | 103 | 46 | 56 | 2,399 | 1,078 | 1,321 |
| Sugar cane | 108 | 58 | 49 | 2,516 | 1,364 | 1,152 |
| Maize | 110 | 43 | 67 | 2,570 | 1,013 | 1,557 |
| Cassava | 125 | 18 | 107 | 2,926 | 420 | 2,506 |
| Barley | 159 | 89 | 70 | 3,727 | 2,083 | 1,644 |
| Rye | 171 | 79 | 92 | 3,990 | 1,846 | 2,143 |
| Paddy rice | 191 | 70 | 121 | 4,476 | 1,641 | 2,835 |
| Wheat | 211 | 123 | 89 | 4,946 | 2,873 | 2,073 |
| Sorghum | 419 | 182 | 238 | 9,812 | 4,254 | 5,558 |
| Biodiesel | m3 per GJ biodiesel | L of water per L of biodiesel | ||||
| Soybean | 394 | 217 | 177 | 13,676 | 7,521 | 6,155 |
| Rapeseed | 409 | 245 | 165 | 14,201 | 8,487 | 5,714 |
| Jatropha* | 574 | 335 | 239 | 19,924 | 11,636 | 8,288 |
The table also shows the amount of water needed for a specific crop to produce 1 L of ethanol or 1 L of biodiesel.
*Average figures for 5 countries (India, Indonesia, Nicaragua, Brazil, and Guatemala).