Journal ArticleDOI
The effect of 10% HF treatment on the resolution of CPMAS 13C NMR spectra and on the quality of organic matter in Ferralsols
Cristiano Nunes Gonçalves,Ricardo Simão Diniz Dalmolin,Deborah Pinheiro Dick,Heike Knicker,Egon Klamt,Ingrid Kögel-Knabner +5 more
TLDR
In this article, the authors investigated the impact of the use of magic angle spinning on the resolution of the CPMAS 13C NMR spectra and the chemical composition of the SOM in the A and B horizons of four Brazilian Ferralsols.About:
This article is published in Geoderma.The article was published on 2003-10-01. It has received 190 citations till now. The article focuses on the topics: Carbon-13 NMR.read more
Citations
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Journal ArticleDOI
SOM fractionation methods: Relevance to functional pools and to stabilization mechanisms
Margit von Lützow,Ingrid Kögel-Knabner,Klemens Ekschmitt,Heinz Flessa,Georg Guggenberger,Egbert Matzner,Bernd Marschner +6 more
TL;DR: In this article, the SOM fractions obtained with such operational fractionation procedures are described in terms of their pool sizes, chemical properties, and turnover rates, and the main objective is to evaluate these operationally defined fractions with respect to their suitability to describe functional SOM pools that could be used to parameterize SOM turnover models.
Journal ArticleDOI
Stabilization of Soil Organic Matter: Association with Minerals or Chemical Recalcitrance?
TL;DR: In this article, the authors analyzed pool size and isotopic composition (14C, 13C) of mineral-protected and recalcitrant organic carbon (OC) in 12 subsurface horizons from 10 acidic forest soils, showing that stabilization of OM by interaction with poorly crystalline minerals and polymeric metal species is the most important mechanism for preservation of OM in these acid subsoil horizons.
Book ChapterDOI
The Depth Distribution of Soil Organic Carbon in Relation to Land Use and Management and the Potential of Carbon Sequestration in Subsoil Horizons
Klaus Lorenz,Rattan Lal +1 more
TL;DR: In this paper, the subsoil carbon (C) sequestration may be achieved by higher inputs of fairly stable organic matter to deeper soil horizons, which can be achieved directly by selecting plants/cultivars with deeper and thicker root systems that are high in chemical recalcitrant compounds like suberin.
Journal ArticleDOI
Microbially derived inputs to soil organic matter: are current estimates too low?
TL;DR: The contributions of microbial biomass to soil organic matter appear to be much higher than the 1-5% reported by other researchers, and organic matter is intimately linked to nutrient release and transport in soils, nitrogen turnover rates, contaminant fate, soil quality, and fertility.
References
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Book
The iron oxides: structure, properties, reactions, occurrences and uses.
R. M. Cornell,Udo Schwertmann +1 more
TL;DR: In this article, the authors introduce the concept of iron oxides and their properties, including surface chemistry and Colloidal stability, as well as their properties in terms of surface area and porosity.
Journal ArticleDOI
Iron Oxide Removal from Soils and Clays by a Dithionite-Citrate System Buffered with Sodium Bicarbonate
TL;DR: In this article, the bicarbonate-buffered Na2S2O4-citrate system was used for removing free iron oxides from latosolic soils, and the least destructive of iron silicate clays.
Book ChapterDOI
Iron oxide removal from soils and clays by a dithionite-citrate system buffered with sodium bicarbonate
O P Mehra,M L Jackson +1 more
TL;DR: In this article, the bicarbonate-buffered Na 2 S 2 O 4 -citrate system was used for removing free iron oxides from latosolic soils, and the least destructive of iron silicate clays.
Journal ArticleDOI
Differenzierung der Eisenoxide des Bodens durch Extraktion mit Ammoniumoxalat‐Lösung
Manual de métodos de análise de solo.
TL;DR: Analises fisicas, Preparo da amostra, Terra fina, cascalho e calhaus; Umidade atual, Umidades residual e fator "f"; Umidde obtida no aparelho extrator de Richards; Umendade obtined com a mesa de tensao; Densidade aparente; Porosidade total; Microporosidade (Metodo Mesa de Tensao); Macroporosideade; Analise granulometrica (Dispersao Total);