Table 1. Winter kill demonstration at Fargo, ND, in 2004 to 2008. |
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|---|---|---|---|---|---|---|---|
| Alfalfa variety |
Cutting management | ||||||
| Cut 1 | Cut 2 | Cut 3 | Cut 4 | Total | |||
-------------tons dry matter/acre----------- |
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2004 |
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| AmeriStand 201+Z | 3 cuts | 1.76 | 1.76 | ||||
| 4 cuts | 1.76 | 1.71 | 3.47 | ||||
| WSI 3.0 | 3 cuts | 1.64 | 1.76 | ||||
| 4 cuts | 1.64 | 1.70 | 3.34 | ||||
| LSD 0.05 (cuts) | NS | NS | 0.17 | ||||
2005 |
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| AmeriStand 201+Z | 3 cuts | 2.34 | 2.08 | 1.78 | 6.20 | ||
| 4 cuts | 2.36 | 2.34 | 1.68 | 1.48 | 7.86 | ||
| WSI 3.0 | 3 cuts | 2.29 | 2.09 | 1.78 | 6.16 | ||
| 4 cuts | 2.12 | 2.23 | 1.79 | 1.41 | 7.55 | ||
| LSD 0.05 (cuts) | NS | NS | NS | 0.94 | |||
| CV, % | 1.6 | 7.4 | 2.2 | 4.1 | |||
2006 |
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| AmeriStand 201+Z | 3 cuts | 3.33 | 1.53 | 0.47 | 5.33 | ||
| 4 cuts | 3.22 | 1.42 | 0.58 | 0.68 | 5.90 | ||
| WSI 3.0 | 3 cuts | 3.18 | 1.38 | 0.62 | 5.18 | ||
| 4 cuts | 2.63 | 1.44 | 0.59 | 1.00 | 5.66 | ||
| Mean | 3 cuts | 3.26 | 1.45 | 0.54 | -- | 5.26 | |
| 4 cuts | 2.93 | 1.43 | 0.58 | 0.84 | 5.78 | ||
| LSD 0.05 (cuts) | 0.24 | NS | NS | 0.41 | |||
| CV, % | 3.3 | 6.0 | 4.9 | 0.9 | 3.3 | ||
2007 |
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| AmeriStand 201+Z | 3 cuts | 2.34 | 1.34 | 1.36 | 5.04 | ||
| 4 cuts | 1.80 | 1.20 | 1.07 | 1.22 | 5.29 | ||
| WSI 3.0 | 3 cuts | 2.34 | 0.97 | 1.36 | 4.67 | ||
| 4 cuts | 1.78 | 1.04 | 0.99 | 1.28 | 5.09 | ||
| Mean | 3 cuts | 2.34 | 1.16 | 1.36 | 4.86 | ||
| 4 cuts | 1.79 | 1.12 | 1.03 | 1.25 | 5.19 | ||
| LSD (0.05) (cuts) | 0.18 | NS | 0.10 | NS | |||
| CV, % | 2.8 | 15.0 | 2.6 | 4.3 | 4.5 | ||
2008 |
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| AmeriStand 201+Z | 3 cuts | 2.47 | 2.16 | 1.55 | 6.18 | ||
| 4 cuts | 2.31 | 1.75 | 1.27 | 1.10 | 6.43 | ||
| WSI 3.0 | 3 cuts | 2.31 | 1.79 | 1.57 | 5.67 | ||
| 4 cuts | 2.33 | 1.83 | 1.43 | 1.22 | 6.82 | ||
| Mean | 3 cuts | 2.39 | 1.97 | 1.56 | 5.92 | ||
| 4 cuts | 2.32 | 1.80 | 1.35 | 1.16 | 6.63 | ||
| LSD (0.05) (cuts) | NS | NS | NS | NS | |||
| CV, % | 6.5 | 9.7 | 10.4 | 6.0 | 7.2 | ||