Table 1.
The average percentage of soil area covered with residues of the previous years’ oat crop, measured after sowing in spring and following the implementation of combinations of two residue treatments and four tillage treatments (Seehusen, 2014).
| Location | Year | Straw removed after harvest |
Straw chopped and retained in field |
||||||
|---|---|---|---|---|---|---|---|---|---|
| DAP∗ | SSP | SAH | SSH | DAP | SSP | SAH | SSH | ||
| Solør | 2011 | 2 | 3 | 7 | 26 | 4 | 3 | 11 | 49 |
| Solør | 2012 | 0 | 1 | 8 | 16 | 1 | 1 | 10 | 23 |
| Østfold | 2011 | 2 | 3 | 23 | 28 | 1 | 5 | 38 | 45 |
| Østfold | 2012 | 0 | 0 | 10 | 6 | 0 | 2 | 20 | 9 |
∗Tillage regimes: DAP, deep autumn plowing; SSP, shallow spring plowing; SAH, shallow autumn harrowing; SSH, shallow spring harrowing.