| Abstract: | This report documents the methods used to aggregate county-level tillage practices to the 8-digit hydrologic unit (HU) watershed. The original county-level data were collected by the Conservation Technology Information Center (CTIC). The CTIC collects tillage data by conducting surveys about tillage systems for all counties in the United States. 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. Two tabular datasets, based on the 1992 enhanced and 2001 National Land Cover Data (NLCD), are provided as part of this report and include the land-cover area-weighted interpolation and aggregation of acreage for each tillage practice in each 8-digit HU watershed in the conterminous United States for each crop. Watershed aggregations were done by overlying the 8-digit HU polygons with a raster of county boundaries and a raster of either the enhanced 1992 or the 2001 NLCD for cultivated land to derive a county/land-cover area weighting factor. The weighting factor then was applied to the county-level 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. |
| Genre: | USGS Numbered Series |
| ProdID: | 99133 |
| Citation Author: | Baker, Nancy T. |
| Citation Contributing Office: | Indiana Water Science Center |
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| Citation Language: | English |
| Citation Larger Work Title: | |
| Citation LatN: | 0500000 |
| Citation LatS: | 0220000 |
| Citation LonE: | -0650000 |
| Citation LonW: | -1250000 |
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| Citation No Pagination: | N |
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| Citation Phsyical Description: | iv, 12 p.; Appendices; Appendix 1; Appendix 2; Appendix 3 |
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| Citation Public Comments: | National Water-Quality Assessment ProgramPrepared in cooperation with the Conservation Technology Information Center |
| Citation Publisher: | U.S. Geological Survey |
| Citation Series: | Data Series |
| Citation Series Code: | DS |
| Citation Series Number: | 573 |
| Citation Search Results Text: | Tillage practices in the conterminous United States, 1989-2004-Datasets Aggregated by Watershed; 2011; DS; 573; Baker, Nancy T. |
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| Citation Year: | 2011 |
| Type: | citation/reference |
| Text: | Tillage practices in the conterminous United States, 1989-2004-Datasets Aggregated by Watershed; 2011; DS; 573; Baker, Nancy T. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/ds_573.gif |
| URL (INDEX PAGE): | http://pubs.usgs.gov/ds/ds573/ |
| URL (METADATA): | http://water.usgs.gov/GIS/metadata/usgswrd/XML/ds573_tillage_lu01.xml |
| URL (METADATA): | http://water.usgs.gov/GIS/metadata/usgswrd/XML/ds573_tillage_lu92e.xml |
| URL (METADATA): | http://water.usgs.gov/GIS/metadata/usgswrd/XML/ds573_wbdhuc8.xml |
| Date Other: | Tue, 29 Mar 2011 00:00 -0500 |
| Publisher: | U.S. Geological Survey |
