TABLE 1.
Fields and samplings
| Field description | Sampling | Wk after planting |
|---|---|---|
| Field site, Quedlinburg; first field (8 blocks | Q1 | 5 |
| with 4 plots each, i.e., 8 replicate plots | Q2 | 13 |
| per plant line); first year of continuous | Q3 | 16 |
| potato cultivation; planting in May 1996 | ||
| Field site, Quedlinburg; second field (4 | Q4 | 7 |
| blocks with 4 plots each; the first field | Q5 | 10 |
| was devastated); second year of | Q6 | 13 |
| continuous potato cultivation; planting | Q7 | 16 |
| in April 1997 | Q8 | 19 |
| Field site, Quedlinburg; second field (4 | Q9 | 10 |
| blocks with 4 plots each); third year of | Q10 | 13 |
| continuous potato cultivation; planting | Q11 | 16 |
| in April 1998 | Q12 | 19 |
| Q13 | 22 | |
| Field site, Groβ Lüsewitz near Rostock; | L1 | 6 |
| first field (8 blocks with 4 plots each); | L2 | 11 |
| first year of continuous potato | L3 | 17 |
| cultivation; planting in May 1996 | ||
| Field site, Groβ Lüsewitz near Rostock; | L4 | 9 |
| first field (8 blocks with 4 plots each); | L5 | 17 |
| second year of continuous potato | L6 | 20 |
| Field site, Groβ Lüsewitz near Rostock; | L9 | 5 |
| second field (3 blocks with 4 plots each); | L10 | 10 |
| first year of continuous potato | L11 | 15 |
| cultivation; planting in April 1998 |