Cultivars | years | c | b | a | R2 | MY (Mg∙ha−1) | ONR (kg∙N∙ha−1) |
Innovator | 2003/4 | 0.0002 | −0.01 | 52.4 | 0.54* | - | - |
| 2004/5 | −0.0006 | 0.22 | 43.6 | 0.79*** | 63.8 | 183 |
| 2005/6 | −0.0004 | 0.18 | 44.4 | 0.50* | 64.6 | 225 |
| 2006/7 | −0.0002 | 0.06 | 50.4 | 0.57* | 54.9 | 150 |
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Gem Russet | 2003/4 | −0.0002 | 0.06 | 39.7 | 0.04 ns | - | - |
| 2004/5 | −0.0003 | 0.12 | 50.9 | 0.50* | 62.5 | 200 |
| 2005/6 | −0.0002 | 0.07 | 55.7 | 0.45* | 61.8 | 175 |
| 2006/7 | −0.0003 | 0.10 | 43.5 | 0.56* | 51.8 | 167 |
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Umatilla Russet | 2004/5 | −0.0005 | 0.17 | 48.9 | 0.79*** | 63.3 | 170 |
| 2005/6 | −0.0003 | 0.12 | 48.9 | 0.60* | 60.9 | 200 |
| 2006/7 | −0.0004 | 0.16 | 39.4 | 0.63* | 55.4 | 200 |
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Bannock Russet | 2003/4 | −0.0003 | 0.11 | 37.5 | 0.58* | 45.8 | 183 |
| 2004/5 | −0.0005 | 0.15 | 50.8 | 0.51* | 62.0 | 150 |
| 2005/6 | −0.0001 | 0.05 | 58.4 | 0.56* | 64.6 | 250 |
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Markies Russet | 2004/5 | −0.0002 | 0.08 | 58.8 | 0.77*** | 66.8 | 200 |
| 2005/6 | −0.0004 | 0.17 | 48.6 | 0.88*** | 66.6 | 212 |