Table 1.
Soybean (S) and corn (C) cropping sequence treatments† in Waseca, MN.
| Treatments | Crop sequence by year | |
|---|---|---|
| 2015 | 2016 | |
| 1 | S2 | S3 |
| 2 | S3 | S4 |
| 3 | S4 | S5 |
| 4 | S5 | C1 |
| 5 | C1 | C2 |
| 6 | C2 | C3 |
| 7 | C3 | C4 |
| 8 | C4 | C5 |
| 9 | C5 | S1 |
| 10 | S1 | S2 |
| 11 | Ca | Sa |
| 12 | Sa | Ca |
| 13 | Ss | Ss |
| 14 | Sr | Sr |
| 15 | Cc | Cc |
| 16 | Cr | Cr |
†
S1 through S5 are first- to fifth-year soybean after 5 year of corn; C1 through C5 are first- to fifth-year corn after 5 year of soybean; Sa and Ca are soybean-corn annual rotation with soybean and corn in the present year, respectively; Ss and Sr are continuous soybean with soybean cyst nematode (SCN)-susceptible and resistant cultivars since 2010, respectively. Cc and Cr are continuous corn with BT corn and non-BT corn (DeKalb DKC46-18), respectively. All soybean, except Sr, were susceptible to SCN. Treatments S1-S5, Sa, Ss, Ca, C1-2, and Cc were analyzed in this study.