| Huri NO3Winter (Ton) | Huri NO3 Annual (Ton) | Year |
| 513 | 748 | 1969/70 |
| 895 | 1205 | 1970/71 |
| 476 | 708 | 1971/72 |
| 261 | 423 | 1972/73 |
| 1363 | 1581 | 1973/74 |
| 361 | 524 | 1974/75 |
| 446 | 659 | 1975/76 |
| 520 | 799 | 1976/77 |
| 555 | 806 | 1977/78 |
| 239 | 365 | 1978/79 |
| 1188 | 1464 | 1979/80 |
| 1233 | 1980/81 | |
| 671 (378) | 844 (385) | Mean (SD) |