| Year | Grains/year | Populus L. | Salix L. | ||||||
| Grains | % | Grains | % | ||||||
| Year | Spring | Year | Spring | Year | Spring | Year | Spring | ||
| 1977-1978 | 18,491 | 3583 | 3572 | 19.38 | 37.06 | 3329 | 3326 | 18.00 | 34.51 |
| 2008-2009 | 17,192 | 2062 | 2062 | 11.99 | 28.79 | 543 | 543 | 3.16 | 7.02 |