Nancy T. Baker 2011 tabular digital data Data Series Data Series 573 Reston, VA U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?ds573_tillage_lu01 Nancy T. Baker 2011 Unknown U.S. Geological Survey Data Series Report 573 Reston, VA U.S. Geological Survey http://pubs.usgs.gov/ds/ds573 This dataset is an aggregation of county-level tillage practices to the 8-digit hydrologic unit watershed. The original county-level data were collected by the Conservation Technology Information Center (CTIC) and is a proprietary dataset. The CTIC collects tillage data by conducting surveys about tillage systems for all counties in the United States. Watershed aggregations were done by overlying the 8-digit HUC polygons with a raster of county boundaries and a raster of the 2001 National Land Cover Data for land use 82 (cultivated land) to derive a county/land-use area weighting factor. The weighting factor was then applied to the county-level tillage data for the counties within each 8-digit HUC and summed to yield the total acreage of each tillage type within each 8-digit HUC watershed. Tillage systems include three types of conservation tillage (no-till, ridge-till, and mulch-till), reduced tillage, and intensive tillage. Total planted acreage for each tillage practice for each crop grown is reported to the CTIC. The dataset includes total planted acreage by tillage type for selected crops (corn, cotton, grain sorghum, soybeans, fallow, forage, newly established permanent pasture, spring and fall seeded small grains, and "other" crops) for 1989-2004. The CTIC did not collect data nationwide for 1999, 2001, and 2003. In addition, data were not collected for all counties every year. Missing data are coded with -9999. The companion WBDHUC8 geospatial dataset is available online: http://water.usgs.gov/lookup/getspatial?wbdhuc8.xml . These data were developed as an ancilliary dataset to provide explanatory variables for U.S. Geological Survey water-quality investigations. The data were derived for use in regional and national studies. The data in this dataset are contained in one dbase table. The table can be appended, via a relate table, to a geospatial coverage of the 8-digit hydrologic unit (HU) boundaries by the numeric 8-digit HU code (the numeric 8-digit code does not contain the leading zero for HUCs < 10000000. These data are intended to be used with a geospatial coverage of 8-digit HU boundaries (available online: http://water.usgs.gov/getspatial?wbdhuc8.xml ). The methods used to aggregate county-level tillage to 8-digit watersheds are provided in the accompanying data-series report: "Tillage Practices in the Conterminous United States, 1989-2004--Datasets Aggregated by Watershed" (Baker, 2011). The original county-level data are proprietary through the CTIC. Those needing access to the original data should contact Conservation Technology Information Center, West Lafayette, Ind., Web: www.ctic.purdue.edu. 2011 publication date In work As needed -127.886246 -64.623167 51.602543 22.885847 None Inlandwaters tillage practice crop residue management planted acreage None Conterminous U.S. agricultural land inland waters None 1989-2004 None This data set was derived from county-level data and should be used for regional and national studies. Disaggregating the data to sub-county level is not recommended. Nancy T. Baker U.S. Geological Survey Hydrologist/GIS specialist mailing and physical address

5957 Lakeside Blvd.

Indianapolis IN 46278 U.S. 317-290-3333 x185 317-290-3333 x185 317-290-3313 ntbaker@usgs.gov M-F 8:00-4:30 http://water.usgs.gov/GIS/browse/ds573_tillage_practice.jpg Illlustration of data set JPG Conservation Technology Information Center, 2004, 2004 National crop residue management survey, Conservation Technology Information Center, West Lafayette, Ind., Web: www.ctic.purdue.edu . Microsoft Windows 2000 Version 5.2 (Build 3790) Service Pack 2; ESRI ArcCatalog 9.3.1.3000 Nancy T. Baker 2011 Data Series Data Series 573 U.S. Geological Survey U.S. Geological Survey Karen Scanlon, executive director Unpublished Proprietary Data None None Conservation Technology Information Center electronic mail system http://www.ctic.purdue.edu/ None None County-level tillage data obtained from Conservation Technology Information Center F:\natsyn104\tillage\gis\tillage_lu01_allcrops.dbf.xml 20090911 Unknown Data checked for outliers F:\natsyn104\tillage\gis\tillage_lu01_corn.dbf.xml 20091023 unknown Data compared to other datasets: NASS, AgCensus 20100521 Unknown NAWQA Area Characterization tool used to allocate county data to 8-digit HUC watersheds. Watershed aggregations were done by overlying the 8-digit HU polygons with a raster of county boundaries and a raster of either the 1992e or 2001 National Land Cover Data for cultivated land to derive a county/land-cover area weighting factor. The weighting factor then was applied to the county0level tillage data for the counties within each 8-digit HU and summed to yield the total acreage of each tillage type within each 8-digit HU watershed. 20100813 Unknown ds573_tillage_lu01 Tillage practices in planted acres Baker OID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated HUC8_N Numeric 8-digit hydrologic unit code WDBHUC8 polygon coverage Identification Number 8-digit HUC ID number Watershed Boundary Dataset crop crop name CTIC survey crop name Name of crop CTIC survey year crop planting year CTIC survey year year CTIC county survey year of crop planting notill No till conservation tillage, greater than 30 percent of soil covered with crop residue CTIC survey planted acres Number of acres planted each year CTIC county survey aggregated to 8-digit HUC ridge Ridge till conservation tillage, greater than 30 percent of soil covered with crop residue CTIC survey planted acres Number of acres planted each year CTIC county survey aggregated to 8-digit HUC mulch Mulch till conservation tillage, greater than 30 percent of soil covered with crop residue CTIC survey planted acres Number of acres planted each year CTIC county survey aggregated to 8-digit HUC reduced Reduced tillage (not considered conservation tillage), 15-30 percent of crop residue left on soil CTIC survey planted acres Number of acres planted each year CTIC county survey aggregated to 8-digit HUC intense Intensive or conventional tillage, less than 15 percent residue left on soil CTIC survey planted acres Number of acres planted each year CTIC county survey aggregated to 8-digit HUC totacre Total planted acres (sum of all tillage types) Baker planted acres sum of all tillage types calculated pctnotil Percentage of no tilll acres Baker percentage (no till / totacre) *100 calculated pctridge Percentage of ridge tilll acres Baker percentage (ridge till / totacre) *100 calculated pctmulch Percentage of mulch till acres Baker percentage (mulch till / totacre) *100 calculated pctreduc Percentage of reduced tilll acres Baker percentage (reduced till / totacre) *100 calculated pctinten Percentage of intensive tilll acres Baker percentage (intensive till / totacre) *100 calculated U.S. Geological Survey Ask USGS - Water Webserver Team mailing address

445 National Center

Reston VA 20192 U.S. 1-888-275-8747 (1-888-ASK-USGS) http://water.usgs.gov/user_feedback_form.html Downloadable Data Although this data set has been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data and related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. DBF (dbase file) 158.768 http://water.usgs.gov/GIS/dsdl/ds573_tillage_lu01.zip None. This dataset is provided by USGS as a public service 20110222 U.S. Geological Survey Ask USGS -- Water Webserver Team mailing address

445 National Center

Reston Virginia 20192 USA 1-888-275-8747 (1-888-ASK-USGS) http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+ds573_tillage_lu01 FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998