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Fertilizer Application

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Nitrogen fertilizer application (inferred from sales) by county for the entire Upper Mississippi Basin: 1991

The data represented in this map have been adapted from publicly available data products provided by the United States Geological Survey. These data contain estimates of nitrogen-fertilizer sales for the conterminous United States in 1991 as reported by the U.S. Environmental Protection Agency (1990). The information contained within these data have been used to create an assessment of the intensity of soil enrichment practices in counties throughout the Upper Mississippi Basin. The original data can accessed via the following USGS website: http://water.usgs.gov/lookup/getgislist.


Commercial fertilizer, lime and soil conditioner application by county for the entire Upper Mississippi Basin: 2002

The data represented in this map have been adapted from publicly available data products provided by the National Agricultural Statistics Service. The information contained within these data have been used to create an assessment of the agricultural land use and the intensity of those practices in counties throughout the Upper Mississippi Basin. The original data can accessed via the following USDA website: http://www.usda.gov/nass/.


Commercial fertilizer, lime and soil conditioner application by county for the entire Upper Mississippi Basin: 1997

The data represented in this map have been adapted from publicly available data products provided by the National Agricultural Statistics Service. The information contained within these data have been used to create an assessment of the agricultural land use and the intensity of those practices in counties throughout the Upper Mississippi Basin. The original data can accessed via the following USDA website: http://www.usda.gov/nass/.



Manure application by county for the entire Upper Mississippi Basin: 2002

The data represented in this map have been adapted from publicly available data products provided by the National Agricultural Statistics Service. The information contained within these data have been used to create an assessment of the agricultural land use and the intensity of those practices in counties throughout the Upper Mississippi Basin. The original data can accessed via the following USDA website: http://www.usda.gov/nass/.