| Year | Cover | 2002 | 2004 | 2006 | 2008 | 2010 | 2012 | 6-year |
| Tillage | Crop | Average | ||||||
| Treatment | Soybean 1000 plants/ha | |||||||
| NT | yes | 298a* | 253a | 330a | 270b | 291a | 166a | 271a |
| NT | no | 293a | 240a | 320a | 310a | 297a | 170a | 272a |
| CP | yes | 380a | 233a | 400a | 398a | 284a | 124a | 304a |
| CP | no | 393a | 228a | 363a | 390a | 274a | 128a | 298a |
| MP | yes | 403a | 245a | 415a | 333a | 290a | 96a | 304a |
| MP | no | 420a | 255a | 388a | 360a | 286a | 100a | 302a |
| Year | Cover | 2001 | 2003 | 2005 | 2007 | 2009 | 2011 | 6-year |
| Tillage | Crop | Average | ||||||
| Treatment | Corn 1000 plants/ha | |||||||
| NT | yes | 65a | 61a | 72a | 66a | 69a | 76a | 68a |
| NT | no | 63a | 60a | 71a | 68a | 65a | 75a | 67a |
| CP | yes | 58a | 60a | 76a | 68a | 66a | 66a | 65a |
| CP | no | 56a | 61a | 76a | 68a | 66a | 69a | 66a |
| MP | yes | 64a | 61a | 68a | 66a | 68a | 61a | 65a |
| MP | no | 68a | 60a | 69a | 68a | 64a | 62a | 65a |