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