Directory UMM :Data Elmu:jurnal:S:Soil Biology And Chemistry:Vol32.Issue2.2000:

Soil Biology & Biochemistry 32 (2000) 241±252
www.elsevier.com/locate/soilbio

Nature of organic nitrogen in ®ne particle size separates of sandy
soils of highly industrialized areas as revealed by NMR
spectroscopy
Heike Knicker*, Michael W.I. Schmidt 1, Ingrid KoÈgel-Knabner
Department of Soil Science, Technische UniversitaÈt MuÈnchen, 85350 Freising-Weihenstephan, Germany
Accepted 17 August 1999

Abstract
The structure of nitrogen-containing compounds of the ®ne particle size fractions (