Table C1. Comparison of results from two methods of estimating fertilizer inputs of nitrogen and phosphorus for selected basins in the lower Tennessee River Basin
[Estimates are reported in tons per year of nitrogen (N) or phosphorus (P); fertilizer sales method [A] based on State and county sales information (J. Fletcher, West Virginia University, written commun., 1992; fertilizer application recommendation method [B] based on recommendations from Savoy and Joines (1998), Adams and others (1994); difference between estimates calculated as [A-B]/[A], in percent]
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Estimated input
Estimated from fertilizer Difference in
input from application estimated
Site fertilizer sales recommendation inputs
identi- method (1991) method (1992) (in percent)
fica- Surface-water station/site location A B (A-B)/A
tion _______________________________________________________ ___________________ __________________ _______________
(fig. 2) Number Name N P N P N P
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1 PRI038 Clarks River at Almo, Ky. 3,042 689 2,554 589 16 14
2 03604000 Buffalo River near Flat Woods, Tenn. 1,613 414 1,083 379 33 8
4 001025 Duck River below Normandy Dam, Tenn. 885 227 706 224 20 1
5 001065 Duck River at Williamsport, Tenn. 5,192 1,333 4,617 1,775 11 -33
6 475793 Duck River above Hurricane Mills, Tenn. 6,651 1,707 6,245 2,401 6 -41
7 002395 Shoal Creek at Highway 43, near 1,158 297 764 249 34 16
Lawrenceburg, Tenn.
9 001207 Elk River below Tims Ford Dam, Tenn. 3,178 816 2,414 714 24 12
10 475796 Elk River near Prospect, Tenn. 7,591 1,948 6,061 2,032 20 -4
11 FLCR7 Flint Creek near Falkville, Ala. 182 30 94 44 48 -46
12 TOWNCREEK15 Town Creek near Geraldine, Ala. 730 121 372 116 49 4
13 002375 Sequatchie River at Valley Road, Tenn. 862 221 667 259 23 -17
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