For this type of crop, there is no direct relationship between the level of production and the amount of nitrogen absorbed by the plant at harvest
| Crop | Needs (in kg/ha) | Source |
| Sugarbeet | 220 | ITB, 2012 |
| Industry vegetables | By type | UNILET, 2012 |
| Fresh vegetables | By type New Products : melon, pepper, tomato |
Fertilization Agronomy CTIFL , 2012 |
| Seed-bearing | By type | FNAMS, 2015 |