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000011859 0247_ $$2DOI$$a10.1002/jpln.200800224
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000011859 041__ $$aeng
000011859 082__ $$a570
000011859 084__ $$2WoS$$aAgronomy
000011859 084__ $$2WoS$$aPlant Sciences
000011859 084__ $$2WoS$$aSoil Science
000011859 1001_ $$0P:(DE-Juel1)VDB9230$$aSéquaris, J.-M.$$b0$$uFZJ
000011859 245__ $$aOrganic-carbon fractions in an agricultural topsoil assessed by the determination of the soil mineral surface area
000011859 260__ $$aWeinheim$$bWiley-VCH$$c2010
000011859 300__ $$a699 - 705
000011859 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article
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000011859 440_0 $$09183$$aJournal of Plant Nutrition and Soil Science - Zeitschrift für Pflanzenernährung und Bodenkunde$$v173$$x1436-8730$$y5
000011859 500__ $$aWe thank three anonymous reviewers and the Associate Editor for their numerous valuable comments which helped to improve the manuscript. This work was performed as part of the HGF strategy fund project "Soil Functions" We thank C Walraf for her skilful laboratory assistance and J. Borchardt (Troposphere, ICG 2) for his help with the N<INF>2</INF> gas-adsorption technique We are grateful to Dr. M. Kehl (INRES, Bonn University) for the particle-size-distribution analysis The elemental chemical analyses performed at the Central Division of Analytical Chemistry (ZCH) are gratefully acknowledged G Guisado (gregorig@ucr.edu), M. R. Magarinos (rosario.magarinos-bernabe@basf.com), and C Moreno (clkcarlos2@mixmail.com) on leave from the University of Burgos (Spain) were supported by the European Community (Erasmus Grant)
000011859 520__ $$aAccording to recent conceptual models, the organic carbon (OC) of soils can be divided into OC fractions of increasing stability from labile free OC to resistant OC associated with the soil mineral phase. In this study, we present a method for quantifying two OC fractions based on soil aggregate-size fractionation and the N-2 gas-adsorption method. For this purpose, we analyzed soil material of the plow layer of a Haplic Chernozem subjected to different fertilizer treatments (no fertilizer, mineral fertilizer, mineral and organic fertilizer). The total organic-C concentration (TOO) and the clay content of the different size fractions were determined as well as the specific surface area (SSA(mineral)) and the sample pore volume after thermal oxidation (OC-free). The TOC of the different soil-aggregate fractions was linearly related to SSA(mineral). Clay-associated OC and nonassociated OC fractions of the different soil samples were quantified using two methods based on the OC surface loading at the clay fraction. The application of organic fertilizer increased the amount of nonassociated OC but hardly affected the concentration of clay-associated OC. This finding agrees with previous studies on C dynamics in soils and indicates a finite capacity of soil materials to sequester OC. Even without any addition of organic fertilizer, the mineral phase of the analyzed soil material appears to be C-saturated.
000011859 536__ $$0G:(DE-Juel1)FUEK407$$2G:(DE-HGF)$$aTerrestrische Umwelt$$cP24$$x0
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000011859 65320 $$2Author$$asoil physical fractionation
000011859 65320 $$2Author$$aN-2 gas-adsorption method
000011859 65320 $$2Author$$aOC fractions
000011859 65320 $$2Author$$amineral specific surface area
000011859 65320 $$2Author$$aclay-associated OC
000011859 65320 $$2Author$$aOC sequestration
000011859 7001_ $$0P:(DE-HGF)0$$aGuisado, G.$$b1
000011859 7001_ $$0P:(DE-HGF)0$$aMagarinos, M.$$b2
000011859 7001_ $$0P:(DE-HGF)0$$aMoreno, C.$$b3
000011859 7001_ $$0P:(DE-Juel1)VDB202$$aBurauel, P.$$b4$$uFZJ
000011859 7001_ $$0P:(DE-Juel1)VDB1124$$aNarres, H.-D.$$b5$$uFZJ
000011859 7001_ $$0P:(DE-Juel1)129549$$aVereecken, H.$$b6$$uFZJ
000011859 773__ $$0PERI:(DE-600)1481142-x$$a10.1002/jpln.200800224$$gVol. 173, p. 699 - 705$$p699 - 705$$q173<699 - 705$$tJournal of plant nutrition and soil science$$v173$$x1436-8730$$y2010
000011859 8567_ $$uhttp://dx.doi.org/10.1002/jpln.200800224
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000011859 9131_ $$0G:(DE-Juel1)FUEK407$$bErde und Umwelt$$kP24$$lTerrestrische Umwelt$$vTerrestrische Umwelt$$x0
000011859 9141_ $$y2010
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