FLORIDA GEOGRAPHIC DATA LIBRARY DOCUMENTATION
VERSION 2004
TITLE: COUNTY BASED ESTIMATES OF NITROGEN AND PHOSPHORUS CONTENT OF ANIMAL MANURE IN THE UNITED STATES FOR THE YEAR 1992.
Geodataset Name: MANURE Geodataset Type: SHAPEFILE Geodataset Feature: POLY
GENERAL DESCRIPTION:
This data set contains county estimates of nitrogen and phosphorus content of animal wastes produced annually for the year 1992. The estimates are based on animal populations for those years from the 1992 Census of Agriculture (U.S. Bureau of the Census, 1995) and methods for estimating the nutrient content of manure from the Soil Conservation Service (1992).
DATA SOURCE(S): U.S.G.S. SCALE OF ORIGINAL SOURCE MAPS: 1:2000000 DATE OF AUTOMATION OR SOURCE: 1994 GEODATASET EXTENT: State of Florida 
FEATURE ATTRIBUTE TABLES:
Datafile Name: MANURE92FL.DBF Name Width Type Precision SHAPE 8 SHAPEPOLY - FIPS 9 DECIMAL 0 YEAR 9 DECIMAL 0 NTOTAL 19 DECIMAL 3 PTOTAL 19 DECIMAL 3 BEEFCOWS 19 DECIMAL 3 MILKCOWS 19 DECIMAL 3 HEIFERS_CA 19 DECIMAL 3 STEERS_CAL 19 DECIMAL 3 HOGS_PIGS 19 DECIMAL 3 SHEEP_LAMB 19 DECIMAL 3 HORSES_PON 19 DECIMAL 3 CHICKENS 19 DECIMAL 3 PULLETS 19 DECIMAL 3 BROILERS 19 DECIMAL 3 TURKEYS 19 DECIMAL 3 TURKEY_HEN 19 DECIMAL 3 DESCRIPT 50 CHARACTER - 
FEATURE ATTRIBUTE TABLES CODES AND VALUES:
ITEM ITEM DESCRIPTION SHAPE Data attribute inherent to the ESRI shapefile format, which defines the data as a point, polyline, or polygon. FIPS State/County Federal Information Processing Standards code 5 digit state/county FIPS code (state + county) Great Lakes = 90000 Canadian Islands in Great Lakes = 99999 YEAR Year which data are from NTOTAL Total nitrogen content (kg) of animal wastes produced in 1992 PTOTAL Total phosphorus content (kg) of animal wastes produced in 1992 BEEFCOWS Area of polygon in square coverage units (sq. meters) MILKCOWS Number of Milk cows in 1992 HEIFERS_CA Number of Heifers and heifer calves in 1992 STEERS_CAL Number of Steers, steer calves, bulls, and bull calves in 1992 HOGS_PIGS Number of Hogs and pigs in 1992 SHEEP_LAMB Number of Sheep and lambs in 1992 HORSES_PON Number of Horses and ponies in 1992 CHICKENS Number of Chickens >= 3 months old in 1992 PULLETS Number of Pullet chicks and pullets < 3 months old in 1992 BROILERS Number of Broilers and other meat-type chickens in 1992 TURKEYS Number of Turkeys in 1992 TURKEY_HEN Number of Turkey hens kept for breeding in 1992 DESCRIPT FGDL added item delineating county name 
USER NOTES:
These estimates are intended for large-scale ground- and surface-water analyses of nutrient sources or changes in these sources. These data on nutrients in manure can be compared to fertilizer inputs of nutrients. The use of trade names is for identification purposes only and does not constitute endorsement by the U.S. Geological Survey. The county lines were not used in the nutrient computations and are provided for displaying the data as a courtesy to the user. The data is organized by 5-digit state/county FIPS (Federal Information Processing Standards) code. The amount of nitrogen and phosphorus present in manure (in kilograms) has been calculated for each county of the United States. The procedure is identical to that of Smith and others (1997), which covered the year 1987. Nutrient estimates for the years 1982 and 1987 were computed again for the data set here, and the results were checked against the results computed previously by Alexander (written commun.,1992) for those years to ensure that they were identical. Limitations: The estimates are county level and are based on estimates of the nutrient content of animal manure produced per 1,000 pounds of animal weight on a daily basis. One important limitation of the animal population numbers from the Census of Agriculture is that for some counties and animal classes, no data are reported. This limitation reportedly is the result of restrictions on including animal population data for counties where animal production is dominated or limited to one business or farm. These data therefore are considered trade secrets and may not be included in the county-based data. This limitation on population data at the county level results in discrepancie when county-based data are summed and compared to national animal population totals. At the present we have no way of estimating animal populations for those counties with missing data and further have no way of determining which counties are missing data. Therefore, the animal manure, nitrogen and phosphorus estimates for some counties are an underestimate of the total nutrient form animal manure in those counties. A note concerning scale: Scale is an important factor in data usage. Certain scale datasets are not suitable for some project, analysis, or modelling purposes. Please be sure you are using the best available data. 1:24000 scale datasets are recommended for projects that are at the county level. 1:24000 data should NOT be used for high accuracy base mapping such as property parcel boundaries. 1:100000 scale datasets are recommended for projects that are at the multi-county or regional level. 1:250000 scale datasets are recommended for projects that are at the regional or state level or larger. Vector datasets with no defined scale or accuracy should be considered suspect. Make sure you are familiar with your data before using it for projects or analyses. Every effort has been made to supply the user with data documentation. For additional information, see the References section and the Data Source Contact section of this documentation. For more information regarding scale and accuracy, see our web pages at: http://www.geoplan.ufl.edu/education.html
FGDL QUALITY ASSURANCE STATUS:
-Upcased all character records -Reprojected data to FGDL Albers HPGN (See "Map Projection Parameters" below) -Data was clipped to the State of Florida -Added DESCRIPT item based on the County name -Dropped old coverage internal items: MANURE92FL#, MANURE92FL-ID, MANURE92_, MANURE92_I -Dropped AREA and PERIMETER items, the values were incorrect.
REFERENCES:
US Geological Survey URL:http://water.usgs.gov/lookup/getspatial?manure U.S. Bureau of the Census, 1995, 1992 Census of Agriculture: The Bureau, Washington D.C. (machine readable data files). Smith, R.A., Schwarz, G.E., and Alexander, R.B., 1997, Regional interpretation of water-quality monitoring data, Water Resources Research, v. 33, no. 12, pp. 2781-2798. Soil Conservation Service, 1992, Agricultural Waste Management Field Handbook, Chapter 4, U.S. Government Printing Office, Washington, D.C.
DATA LINEAGE SUMMARY:
GeoPlan downloaded this dataset in ARC/INFO Export Interchange file format from the Georgia GIS Data Clearing House website in 2001: http://www.gis.state.ga.us/Clearinghouse/clearinghouse.html. When received, this data was in Albers projection, Datum: NAD27, Spheroid: Clark1866, Units: Meters. The dataset was reprojected to FGDL Albers HPGN (See "Map Projection Parameters" below) and clipped from the SE Region to the State of Florida.
MAP PROJECTION PARAMETERS:
Projection ALBERS Units METERS Datum HPGN Spheroid GRS1980 1st standard parallel 24 0 0.000 2nd standard parallel 31 30 0.000 Central meridian -84 0 0.000 Latitude of projection's origin 24 0 0.000 False easting (meters) 400000.00000 False northing (meters) 0.00000
DATA SOURCES CONTACT(S):
Name: U.S. Geological Survey Abbr.name: U.S.G.S. Address: 12201 Sunrise Valley Drive, MS-413 Reston, VA 20192 Phone: 703-648-6854 Fax: 703-648-6693 Web site: www.usgs.gov, also http://water.usgs.gov/lookup/getspatial?manure Email: kjhitt@usgs.gov Contact Person: Kerie J. Hitt Phone: 703-648-6854 Email: kjhitt@usgs.gov
FGDL CONTACT:
Name: Florida Geographic Data Library Abbr. Name: FGDL Address: Florida Geographic Data Library 431 Architecture PO Box 115706 Gainesville, FL 32611-5706 Web site: http://www.fgdl.org Contact FGDL: Technical Support: http://www.fgdl.org/fgdlfeed.html FGDL Frequently Asked Questions: http://www.fgdl.org/fgdlfaq.html FGDL Mailing Lists: http://www.fgdl.org/fgdl-l.html For FGDL Software: http://www.fgdl.org/software.html