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| Author | : Boyd E. Wickman |
| Publisher | : |
| Total Pages | : 12 |
| Release | : 1981 |
| Genre | : Douglas-fir tussock moth |
| ISBN | : |
| Author | : Pacific Northwest Forest and Range Experiment Station (Portland, Or.) |
| Publisher | : |
| Total Pages | : 308 |
| Release | : 1980 |
| Genre | : Forests and forestry |
| ISBN | : |
| Author | : Pacific Northwest Forest and Range Experiment Station (Portland, Or.) |
| Publisher | : |
| Total Pages | : 58 |
| Release | : 1982 |
| Genre | : Forests and forestry |
| ISBN | : |
| Author | : Boyd E. Wickman |
| Publisher | : |
| Total Pages | : 8 |
| Release | : 1985 |
| Genre | : Degree days |
| ISBN | : |
Met veldproeven werd aangetoond dat een graad-dag-computer en een registratie-thermograaf in het vroege voorjaar en de zomer vergelijkbare resultaten gaven. Voor fenologisch onderzoek was de biofenometer net zo nauwkeurig en meer efficient dan de hygrothermograaf
