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NE Iowa | Go to the Iowa GIS server with this link:
https://isugisf.maps.arcgis.com/apps/webappviewer/index.html?id=47ac...
The symbol that looks like a stack of papers is the "layers" button. Click on that and go to the "Iowa Historical Photos" section. They have the USDA photos from every decade from 1930's to present. If you turn on say the 1980's date you might need to find what is shown and turn it off. If two things are picked it shows whichever was picked first. Awesome sight but is only available for Iowa.
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map for past crops
