Ingrid Kögel

发表

Alteration of gymnosperm and angiosperm lignin during decomposition in forest humus layers

W. Zech, F. Ziegler, Ingrid Kögel, 1986 .

Estimation and decomposition pattern of the lignin component in forest humus layers

Ingrid Kögel, 1986 .

Changes in the lignin fraction of spruce and pine needle litter during decomposition as studied by some chemical methods

W. Zech, M. Johansson, Ingrid Kögel, 1986 .

Amino sugar determination in organic soils by capillary gas chromatography using a nitrogen-selective detector

Ingrid Kögel, R. Bochter, 1985 .

Characterization of lignin in forest humus layers by high-performance liquid chromatography of cupric oxide oxidation products

Ingrid Kögel, R. Bochter, 1985 .

Lignin signature of subalpine Rendzinas (Tangel- and Moderrendzina) in the Bavarian Alps

W. Zech, F. Ziegler, Ingrid Kögel, 1988 .

CHEMICAL COMPOSITION OF THE ORGANIC MATTER IN FOREST SOILS: 1. FOREST LITTER

P. Hatcher, H. Schulten, W. Zech, 1988 .

Decomposition in forest humus layers studied by CPMAS 13C NMR, pyrolysis-field ionization-mass spectrometry and CuO oxidation

P. Hatcher, H. Schulten, Ingrid Kögel, 1987 .

The phenolic acid content of cashew leaves (Anacardium occidentale L.) and of the associated humus layer, Senegal

W. Zech, Ingrid Kögel, 1985 .

31P-NMR-spectroscopic investigations of NaOH-extracts from soils with different land use in Yucatan (Mexico)

H. Alt, Ingrid Kögel, N. Zech, 1985 .