ISHS Acta Horticulturae 184: I International Symposium on Computer Modelling in Fruit Research and Orchard Management
THE OMNIDATA BIOPHENOMETER (TA45-P): A CHILL UNIT AND GROWING DEGREE HOUR ACCUMULATOR |
| Authors: | E.A. Richardson, J.L. Anderson, R.H. Campbell |
| Abstract:
The BIOPHENOMETER TA45-P was developed to take advantage of the improved Chill Unit and ASYMCUR models that predict the phenological development of fruit trees. It is a miniature, battery-operated instrument that measures the air temperature each 7.5 minutes and calculates the chill units and growing degree hours for each observation. These calculations are then summed and stored in 6 channels; data can be retrieved by pressing the external button and reading the information for each channel. Dates of first or full bloom predicted by the models were usually within 3 to 4 days of the observed dates. | |
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