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Classification and Mapping of Agricultural Land for National Water-Quality Assessment

By Robert J. Gilliom and Gail P. Thelin

U.S. Geological Survey Circular 1131

Figure 7
Figure 7. Distribution of row crops in the "corn, soybeans, hogs" cluster of Sommer and Hines (1991), as shown in figure 3.
Figure 7 Explanation
Figure 7. Continued.

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