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Evaluation of the Effect of Density on Potato Yield and Tuber Size Distribution

Dep. of Horticulture and Dep. of Agriculture and Applied Economics, Univ. of Wisconsin-Madison, 1575 Linden Dr., Madison, WI 53706

View larger version (12K): [in this window] [in a new window]   Figure 1. Influence of in-row spacing on potato plant population near Coloma, WI, in 2002 and 2003.

View larger version (19K): [in this window] [in a new window]   Figure 2. Response of potato stem density to potato plant density in commercial production field during 2002 and 2003 near Coloma, WI.

View larger version (18K): [in this window] [in a new window]   Figure 3. Potato tuber density response to plant and stem density in a commercial potato production field during 2002 and 2003 near Coloma, WI.

View larger version (16K): [in this window] [in a new window]   Figure 4. Relationship between potato yield and plant, stem, and tuber density in commercial field trials during 2002 and 2003 near Coloma, WI.

View larger version (18K): [in this window] [in a new window]   Figure 5. Average tuber size in response to stem and tuber density in commercial field trials during 2002 and 2003 near Coloma, WI.

View larger version (30K): [in this window] [in a new window]   Figure 6. (a) Proportion of tubers fitting into each size category from three plots selected with high, medium, and low density, and (b) observed versus estimated proportion of tubers within each size category for a select plot from commercial field trials near Coloma, WI.

View larger version (73K): [in this window] [in a new window]   Figure 7. Observed and estimated cumulative proportion of potato tubers with increasing tuber size across different stem densities in commercial field trials near Coloma, WI, across 2002 and 2003. Individual data points were provided () to illustrate fit of the predicted response.

View larger version (47K): [in this window] [in a new window]   Figure 8. Estimated tuber size distribution across different stem densities estimated with data from commercial field trials from 2002 and 2003 near Coloma, WI.