spacer

Illinois Fertilizer Conference Proceedings
January 23-25, 1995

Home 1995 Index Search

Table 3: Comparison of soil NO3-N analyses by extraction-distillation and the Cardy Card Nitrate Meterspacer

Soil # NO3-N Determined
Extraction/Distillation (ED) Cardy Card
Nitrate Meter (CC)		 Relative Diff.

[(CC-ED)/ED] x 100
Range Mean SD Range Mean SD
----------------------- ppm ----------------------- (%)
1 2.3 - 2.9 2.8 .40 3 - 4 3.4 .49 21.4
2 2.8 - 3.6 3.2 .37 5 - 6 5.4 .49 68.8
3 4.8 - 5.2 5.2 .36 5 - 7 6.0 0.60 15.4
4 11.4 - 12.8 11.9 .87 11 - 17 13.2 2.70 10.9
5 4.4 - 5.3 4.8 .46 4 - 5 4.6 .49 (4.2)
6 3.0 - 3.4 3.3 .16 2 - 3 2.8 .40 (15.2)
7 4.9 - 5.9 5.4 .49 5 - 7 5.6 0.80 3.7
8 2.7 - 4.6 3.8 .92 2 - 5 3.6 1.00 (5.3)
9 1.6 - 2.5 2.2 .45 1 - 4 3.0 1.10 36.4
10 2.3 - 2.8 2.6 .21 3 - 4 3.6 .49 38.5
11 3.0 - 3.4 3.2 .23 2 - 5 3.6 1.02 12.5
12 2.7 - 3.6 3.0 .49 2 - 3 2.2 .40 (26.7)

Back to Main Report

spacer
*Department of Crop Sciences
*University of Illinois Extension
*College of Agricultural, Consumer, and Environmental Sciences
*University of Illinois at Urbana-Champaign
*Illinois Fertilizer & Chemical Association
*Illinois Department of Agriculture		   Design by: Crop Sciences Computer and Web Support Group
Copyright © 2005 University of Illinois at Urbana-Champaign
Email site problems to the webmaster