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Table 6. Soil nitrate concentration under wheat at three locations in southwest North Dakota, 1997.

  Beach Amidon Pick City
Depth Fumigated Natural Fumigated Natural Fumigated Natural
inches lb/a lb/a lb/a lb/a lb/a lb/a
0 - 6 3 3 3 7 9 49
6 - 12 3 3 3 8 6 31
12 - 18 3 3 3 3 7 28
18 - 24 3 3 3 3 4 24
24 - 30 3 3 3 3 5 21
30 - 36 3 4 3 3 4 12
36 - 42 4 6 3 3 3 9
42 - 48 4 4 3 3 3 6
Total 26 29 24 33 41 180

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