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Published in Agron J 98:522-528 (2006)
DOI: 10.2134/agronj2005.0136
© 2006 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
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Approaches to Modeling Potato Leaf Appearance Rate

David H. Fleishera,*, Rose M. Shillitob, Dennis J. Timlina, Soo-Hyung Kima and Vangimalla R. Reddya

a USDA-ARS Crop Systems and Global Change Lab., 10300 Baltimore Ave., Beltsville, MD 20705
b Dep. of Natural Resources and Landscape Architecture, Univ. of Maryland, College Park, MD 20742


Figure 1
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  		Fig. 1. Leaf appearance rates with standard errors vs. observed average daily temperature for experiments D0 and D1. The nonlinear temperature response model based on the modified ß distribution parameters (Table 3) is shown as the solid line.

 

Figure 2
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  		Fig. 2. Comparison of leaf appearance rates (with standard errors) vs. observed average daily temperature for D0, D1, D2, and the data of Kirk and Marshall (1992; KM). The nonlinear temperature response model based on the modified ß distribution parameters (Table 3) is shown as the solid line.

 

Figure 3
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  		Fig. 3. Leaf appearance data separated for each temperature treatment (T1 through T6) in experiment D1. Data points are the averaged value of five observations at each measurement date (error bars not shown for clarity).

 

Figure 4
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  		Fig. 4. Phyllochrons (with standard errors) obtained from leaf appearance data for each temperature treatment from D1 vs. observed average daily temperature. Treatment day/night temperatures (°C) are shown in parentheses above each value.

 




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