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Illinois Fertilizer Conference Proceedings
January 24-26, 2000

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Table 3. Residual soil NO3-N content in the upper 4 feet of soil
as affected by rate of N application and crop grown.
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Site No. Year of Corn Applied N (lb N/acre) Plot area
0 160 240 0 160 240
1997 1998
NO3-N (lb/acre)
1705 1997 45 51 49 52 48 57
2704 1997 55 72 73 80 84 88
2720 1997 6 12 22 94 89 89
2722 1997 47 65 92 2 32 31
2725 1997 31 52 121 77 84 75
3715 1997 66 82 121 74 81 79
3717 1997 52 58 68 100 90 90
1833 1998       71 63 71
2806 1998       46 56 56
2822 1998       30 51 54
3827 1998       89 145 229

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