{286fa7ac-e638-4d2e-870a-eda4cbdd6481} eng; USA utf8 dataset EnviroAtlas Coordinator U.S. Environmental Protection Agency, Office of Research and Development-Sustainable and Healthy Communities Research Program, EnviroAtlas Geospatial Data Owner (919) 541-3832 109 T.W. Alexander Drive Research Triangle Park NC 27709 EnviroAtlas@epa.gov https://www.epa.gov/enviroatlas pointOfContact 2025-07-23 ISO 19115 Geographic Information - Metadata ISO 19115:2003/Cor.1:2006(E) EnviroAtlas - Agricultural phosphorus balance for 2012 by 12-digit HUC for the Conterminous United States 2016-10-28 publication U.S. EPA Office of Research & Development (ORD) - National Exposure Research Laboratory (NERL) Research Triangle Park NC publisher US Environmental Protection Agency (US EPA) originator This EnviroAtlas national map displays the mean phosphorus (P) balance between inorganic fertilizer and confined manure inputs and P crop removal on croplands in the conterminous United States (excluding Hawaii and Alaska) for the year 2012 by 12-digit HUC. These data are based on International Plant Nutrition Institute compilations of county-level fertilizer sales data, confined manure production, and major crop harvest and P content of these crops, as well as the cropland area from the USGS's U.S. conterminous wall-to-wall anthropogenic land use trends (NWALT) 2012 land cover data. This dataset was produced by the US EPA to support research and online mapping activities related to EnviroAtlas. EnviroAtlas (https://www.epa.gov/enviroatlas) allows the user to interact with a web-based, easy-to-use, mapping application to view and analyze multiple ecosystem services for the contiguous United States. The dataset is available as downloadable data (https://edg.epa.gov/data/Public/ORD/EnviroAtlas) or as an EnviroAtlas map service. Additional descriptive information about each attribute in this dataset can be found in its associated EnviroAtlas Fact Sheet (https://www.epa.gov/enviroatlas/enviroatlas-fact-sheets). The map, Agricultural Phosphorus Balance, is one of four EnviroAtlas maps that display P inputs and agricultural crop P demand for the conterminous US. These data could be used either alone or in conjunction with other data layers to help identify areas where P is a significant pollution source (over application) or where there are opportunities for more efficient management or recycling to meet crop demands. These data could also be used in models that examine the transport and cycling of P across terrestrial and aquatic ecosystems. Information on crop P demand and uptake is, or will be, needed for the development of nutrient reduction strategies, nutrient credit exchanges, and payments for ecosystem services. Phosphorus (P) is an essential element of all living organisms, as a component of critical biomolecules for genetic material (DNA, RNA), energy transport (ATP) and membranes (phospholipids) within cells. As such it is necessary for plant growth along with nitrogen and other nutrients. In many ecosystems, including agricultural systems, P can limit plant growth and thus food production. In response to such limitations farmers may apply additional P in the form of inorganic fertilizers, food and green waste composts, animal manures, or biosolids from human waste, which all contain P. When released from farms, cities, or industry, P can contribute to water pollution problems because algal growth is limited by P in many freshwater and coastal ecosystems. Because of its essential role in agriculture, but potential as a pollutant, understanding where and how much P fertilizer is applied is important to inform management strategies that increase food security and water quality across the U.S. Information on the balance between P inputs and P uptake/removal from crops (like the 2012 data presented here) is important in order to understand potential areas where surpluses of P on cropland may be a pollution risk, while other areas may be in need of additional P to ensure high crop yields. The overall goal of EnviroAtlas is to employ and develop the best available science to map indicators of ecosystem services production, demand, and drivers for the nation. completed EnviroAtlas Coordinator U.S. Environmental Protection Agency, Office of Research and Development-Sustainable and Healthy Communities Research Program, EnviroAtlas Geospatial Data Owner (919) 541-3832 109 T.W. Alexander Drive Research Triangle Park NC 27709 EnviroAtlas@epa.gov https://www.epa.gov/enviroatlas pointOfContact asNeeded Ecosystem Environment theme EPA GIS Keyword Thesaurus Agriculture Air Ecosystem Services EnviroAtlas Environment Environmental Atlas Health Water Agriculture Air Ecosystem Services EnviroAtlas Environment Environmental Atlas Health Water theme EnviroAtlas Alabama Arizona Arkansas California Colorado Connecticut Delaware Florida Georgia Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas United States Utah Vermont Virginia Washington Washington DC West Virginia Wisconsin Wyoming place None https://edg.epa.gov/EPA_Data_License.html otherRestrictions Use Constraints: None. Please check sources, scale, accuracy, currency and other available information. Please confirm that you are using the most recent copy of both data and metadata. Acknowledgement of the EPA would be appreciated. otherRestrictions Access Constraints: None PUBLIC https://project-open-data.github.io/schema/#accessLevel Standard Technical Controls eng; USA environment -128.02839229 -65.20336449 22.7348894 51.6773602 2012-01-01 We distributed county-specific per area P input and P removal rates to agricultural lands (60 m x 60 m pixels) within the corresponding county. We capped P fertilizer application at 6,000 kg of P per km2, manure at 10,000 kg of P per km2, and crop removal at 9,000 kg of P per km2 to correct for some pixels with unrealistically high rates. true Entity and Attribute Information Entity and Attribute Overview: Agricultural Phosphorus Balance in 2012 was estimated by subtracting Crop Phosphorus Removal from Inorganic Phosphorus Fertilizer and Phosphorus Manure Application (P fertilizer + P manure - P crop removal EnviroAtlas layers). We acquired county-level data describing total inorganic P fertilizer, confined manure and total crop P uptake (kg P yr-1) in 2012 from IPNI (see IPNI detailed methodology for any of these two P inputs and one P output). We used the U.S. National wall-to-wall land use trends (NWALT) for 2012, acquired from the USGS, at the scale of 60 m x 60 m. These data were converted to per area rates (kg P km-2 yr-1) of crop P removal by dividing the total P input or removal by the land area (km2) of combined cultivated crop and hay/pasture (agricultural) lands within a county as determined from county-level summarization of the 2012 NWALT layer. We distributed county-specific per-area P input and P removal rates to agricultural lands (60 m x 60 m pixels) within the corresponding county. We capped P fertilizer application at 6,000 kg of P per km2, P application as manure at 10,000 kg of P per km2, and crop removal at 9,000 kg of P per km2 to correct for some pixels with unrealistically high rates. The estimates were then averaged across each 12-digit HUC and converted to kg/ha/year by dividing by 100. Entity and Attribute Detail Citation: https://www.epa.gov/enviroatlas/enviroatlas-fact-sheets EnviroAtlas Coordinator U.S. Environmental Protection Agency, Office of Research and Development-Sustainable and Healthy Communities Research Program, EnviroAtlas Geospatial Data Owner (919) 541-3832 109 T.W. Alexander Drive Research Triangle Park NC 27709 EnviroAtlas@epa.gov https://www.epa.gov/enviroatlas distributor https://enviroatlas.epa.gov/download/CONUS_metrics_FGDB.zip download Download The URL providing direct access to the downloadable dataset. download https://enviroatlas.epa.gov/download/CONUS_metrics_CSV.zip ESRI:ArcGIS API The endpoint of a web service to access the dataset (REST endpoint, WMS GetCapabilities URL, or a SOAP WSDL endpoint). webMapService https://www.epa.gov/enviroatlas/enviroatlas-data information Documentation URL for accessing related documents such as data dictionary, technical information about a dataset, developer documentation, etc. information https://www.epa.gov/enviroatlas information Home Page Alternative landing page used to redirect user to a contextual, Agency-hosted "homepage" for the Dataset or API information dataset Horizontal Positional Accuracy Report Data were collected using methods that have unknown accuracy (EPA National Geospatial Data Policy [NGDP] Accuracy Tier 10). For more information, please see EPA's NGDP at https://www.epa.gov/geospatial/geospatial-policies-and-standards Features represented have not been tested for completeness Features represented have not been tested for completeness Tests for integrity have not been performed. This lineage was generated by the FGDC CSDGM to 19139 transformation Using R, open previously saved CSV files of fertilizer application rates, manure application rates, and crop P removal rates that have been corrected with maximum cut off rates (see the metadata for Manure_P_kg_km2, Fertilizer_P_kg_km2, and Crop_P_Removal_kg_km2 for information on how these CSV files were developed). Calculate a net agricultural balance (fertilizer + manure - crop removal). Then save this output as a new CSV 2016-07-10T00:00:00 In ArcGIS, used the Extract by Attributes tool to create a new raster that just has the 2 desired NWALT agricultural land uses (cultivated crops and hay/pasture) with "VALUE"=43 or "VALUE"=44 formula and save this layer 2016-07-10T00:00:00 Create a binary version of that layer with the reclassify tool (1 if cell is 43 or 44 and 0 if cell is NA) and save it 2016-07-10T00:00:00 Join the previously saved CSV file containing the net agricultural P application rates with the U.S. county layer using the join attributes tool (base the join on the county identifiers) and export the data. 2016-07-10T00:00:00 Use the polygon to raster tool to create a raster of the net P agricultural application rates from the polygons created in the previous step and using the NWALT layer's cell size of 60m. 2016-07-10T00:00:00 Multiply the binary agricultural land use layer by the net P agricultural application rate raster using the raster calculator tool. This distributes the county-specific annual per-area P rate to the cultivated crop and hay/pasture lands 2016-07-10T00:00:00 Used ArcGIS tool Zonal Statistics as Table to calculate the mean P balance in kg/km2/yr each 12-digit HUC. Divided this value by 100 to convert to mean kg/ha/yr for each HUC. 2016-10-28T00:00:00 unknown 2029-07-23 This metadata was automatically generated from the FGDC Content Standard for Digital Geospatial Metadata standard (version FGDC-STD-001-1998) using the 2024-02-09T11:11:00 version of the FGDC CSDGM to ISO 19139 transform. EnviroAtlas Coordinator U.S. Environmental Protection Agency, Office of Research and Development-Sustainable and Healthy Communities Research Program, EnviroAtlas Geospatial Data Owner (919) 541-3832 109 T.W. Alexander Drive Research Triangle Park NC 27709 EnviroAtlas@epa.gov https://www.epa.gov/enviroatlas pointOfContact