1.0a
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Initial release


1.0b
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Updated database with more data

1.01b
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Fixed table width display bug when large
font size is applied to page

1.10b
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Replaced Chance of N sufficiency Chart with 
percent of maximum yield chart, updated
controls and help to reflect

1.20c
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Modified the table output values
Removed the +-$1 values from the output table
Added N product selection feature
Added North, Central, & South IL regions
Added Wisconsin yield potential categories
Added Wisconsin Irrigated Sands category

1.20d
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4/2/07
Updated Iowa and Illinois database with more data