Illinois Fertilizer Conference Proceedings
January 23-25, 1995
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Table 2: Precision of NO
3
-N analyses with the Cardy Card Nitrate Meter
Soil
NO
3
-N Determined
Range
Mean
Std. Deviation
---------- ppm ----------
#4
31 - 33
32.1
0.54
#10
23 - 24
23.4
0.49
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