This .zip file contains graphic files (in .png format) of each chart and graph in the Economic Research Service report "Nitrogen In Agricultural Systems: Implications For Conservation Policy" (ERR-127), published in September 2011. The content and context of these files is as of the publication date of the report. After time, the material may not reflect the current ERS program of work, may be outdated, and/or superseded, so please visit the website to obtain the latest information: www.ers.usda.gov.

Any reuse of these images should include attribution to "Economic Research Service/USDA."

The following inventory lists each of the files in this folder.

File name	Description

(fig2-1.png)	Figure 2.1 - Nitrogen balance and nitrogen use efficiency
(fig3-1.png)	Figure 3.1 - Acres treated with commercial and/or manure nitrogen not using nitrogen best management practices, 2006
(fig3-2.png)	Figure 3.2 - Acres treated with commercial and/or manure nitrogen not using nitrogen best management practices, by region, 2006
(fig3-3.png)	Figure 3.3 - USDA farm production regions
(fig3-4.png)	Figure 3.4 - Total nitrogen applications above criterion rate by region, 2006
(fig4-1.png)	Figure 4.1 - Historical wetlands converted to cropland, by county, 1997
(fig4-2.png)	Figure 4.2 - Distribution of criterion rates for corn, based on reported expected yield, 2005
(fig4-3.png)	Figure 4.3 - Distribution of nitrogen fertilizer applied to corn that exceeded the criterion rate, 2005