Über Absorptionsspektren von Huminsäuren in Lösungen

Frömel, W.

doi:10.1002/jpln.19380060109

Cited by 21 publications

(1 citation statement)

References 16 publications

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“…It will be evident, that only a destruction of soil organic matter can break this chemical bond. A third difficulty is the fact that the soil organic matter undergoes certain changes in its composition during extraction, especially when using a strong alkaline extradant (FROMEL, 1938 ;WELTE, 1952 ;BREMNER, 1954).…”

Section: Methodsmentioning

confidence: 99%

On the classification and genesis of soils, derived from andesitic volcanic material under a monsoon climate.

Hong¹,

Schuylenborgh²

1959

NJAS

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The Lawu volcano was sampled from an altitude of 500-3, 300 m and investigated morphologically, mineralogically and chemically. The soil organic matter was analysed in respect of its C, H, O and N content. Comparison of soils in a monsoon climate with those formed in a wet climate showed that the process of laterization proceeded to higher altitudes in a monsoon climate. It seems possible to recognize the following belts: a zone from 3, 300 to 2, 500 m altitude with brown podzolic soils, 2, 000-1, 400 m with brown forest soils, 1, 400-1, 000 m with latosolic brown forest soils and 1, 000-300 m with brown and reddish-brown latosolic soils. Organic acid was a more important soil-forming factor than CO2 at altitudes > 1, 000 m and under a monsoon climate. An explanation is proposed for the curious trends of C/N ratios of the soil and organic matter and for the trends in the clay's molar Al2O3/Fe2O3 ratios.-From authors' summary. (Abstract retrieved from CAB Abstracts by CABI’s permission)

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Section: Methodsmentioning

confidence: 99%