This tool calculates rate of demand for 80 produce crops.
To calculate results, select a central market location (within Iowa), consumers,
time period, products, and units of measure.
Results are shown in adjoining tabs. Your selections are shown next to the map.
To begin your calculation, make selections at left, starting at the top.
You must select a central location and click outside the box before data will appear.
If you change selections after viewing result tabs, you must refresh data.
More details, including how this tool can be used, are in the