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Illinois Fertilizer Conference Proceedings
January 21-23, 2002

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Table 2. Concentrations of hydrolyzable and soil-test N for soils studied. *
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Site-year Form of hydrolyzable N
No. Rainfall Total NH4+ Amino acid Amino sugar Soil-test N
mg N kg-1 mg kg-1
1 Normal 1166 304 299 218 221
2 Deficient 1211 380 311 129 219
3 Normal 2510 584 938 393 398
4 Deficient 2361 665 774 328 390
5 Normal 1260 437 564 127 258
6 Deficient 1381 487 597 110 251
LSD (0.001) 3.1 2.9 4.4 5.0 3.0

* Three replicate determinations.

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