Zoom comparison of Midwestern Region displaying raw NDVI values. 
County boundaries are displayed in brown and state boundaries are black. 
2011 image on left and 2012 image on right side of graphic.
See the comparable Weekly Weather and Crop Bulletin at <"http://usda.mannlib.cornell.edu/MannUsda/viewDocumentInfo.do?documentID=1393">Weekly Weather and Crop Bulletin</a> for details.