References

Amézketa,E.,1999.Soil aggregate stability:a review.J.Sustain.Agric.14(2),83-151.

Arca,M.N.,Weed,S.B.,1966.Soil aggregation and porosity in relation to contents of freeiron oxide and clay.Soil Sci.101,164-170.

Barthès,B.,Roose,E.,2002.Aggregate stability as an indicator of soil susceptibility to runoff and erosion;validation at several levels.Catena 47,133-149.

Bascomb,C.L.,1968.Distribution of pyrophosphate-extractable iron and organic carbon in soils of various groups.J.Soil Sci.52,575-581.

Boix-Fayos,C.,Calvo-Cases,A.,Imeson,A.C.,Soriano-Soto,M.D.,2001.Influence of soil properties on the aggregation of some Mediterranean soils and the use of aggregate size and stability as land degradation indicators.Catena 44,47-67.

Bronick,C.J.,Lal,R.,2005.Soil structure and management:a review.Geoderma 124,3-22.

Cammeraat,L.H.,Imeson,A.C.,1998.Deriving indicators of soil degradation from soil aggregation studies in southeastern Spain and southern France.Geomorphology 23(2-4),307-321.

Darboux,F.,Le Bissonnais,Y.,2007.Changes in structural stability with soil surface crusting:consequences for erodibility estimation.Eur.J.Soil Sci.58,1107-1114.

De Gryze,S.,Bossuyt,H.,Six,J.,Meirvenne,M.V.,Govers,G.,Merckx,R.,2008.Factors controlling aggregation in a minimum and a conventionally tilled undulating field.Eur.J.Soil Sci.58,1017-1026.

Denef,K.,Six,J.,Merckx,R.,Paustian,K.,2002.Short-term effects of biological and physical forces on aggregate formation in soils with different clay mineralogy.Plant Soil 246,185-200.

Dong,A.,Chester,A.,Simsiman,G.V.,1983.Soil dispersibility.Soil Sci.136,208-212.

Duiker,S.W.,Rhoton,F.E.,Torrent,J.,Smeck,N.E.,Lal,R.,2003.Iron(hydr)oxide crystallinity effects on soil aggregation.Soil Sci.Soc.Am.J.67,606-611.

Gee,G.W.,Bauder,J.W.,1986.Particle-Size Analysis.In:Klute,A.(Ed.),Methods of Soil Analysis.Part 1.Physical and Mineralogical Methods,second ed.Agronomy Monographs 9.ASA-SSA,Madison,WI,pp.383-411.

Goldberg,S.,Kapoor,B.S.,Rhoades,J.D.,1990.Effect of aluminum and iron oxides and organic matter on flocculation and dispersion of arid zone soils.Soil Sci.150,588-593.

Green,V.S.,Cavigelli,M.A.,Dao,T.H.,Flanagan,D.C.,2005.Soil physical properties and aggregate-associated C,N,and P distributions in organic and conventional cropping systems.Soil Sci.170,822-831.

He,Y.Q.,Sun,B.,2008.Evolvement and Regulation of Red Soil Quality.Science Press,Beijing(in Chinese).

Horn,R.,1990.Aggregate characterization as compared to soil bulk properties.Soil Tillage Res.17(3-4),265-289(5).

Huang,L.,Wang,C.Y.,Tan,W.F.,Hu,H.Q.,Cai,C.F.,Wang,M.K.,2010.Distribution of organic matter in aggregates of eroded ultisols,Central China.Soil Tillage Res.108,59-67.

Huygens,D.,Boeckx,P.,Van Cleemput,O.,Oyarzun,C.,Godoy,R.,2005.Aggregate and soil organic carbons dynamics in South Chilean andisols.Biogeosciences 2,159-174.

Idowu,O.J.,2003.Relationships between aggregate stability and selected soil properties in humid tropical environment.Commun.Soil sci.Plant 34,695-708.

Igwe,C.A.,Akamigbo,F.O.R.,Mbagwu,J.S.C.,1995.Physical properties of soils of southeastern Nigeria and the role of some aggregating agents in their stability.Soil Sci.160,431-441.

Igwe,C.A.,Akamigbo,F.O.R.,Mbagwu,J.S.C.,1999.Chemical and mineralogical properties of soils in southeastern Nigeria in relation to aggregate stability.Geoderma 92,111-123.

Igwe,C.A.,Zarei,M.,Stahr,K.,2009.Colloidal stability in some tropical soils of southeastern Nigeria as affected by iron and aluminium oxides.Catena 77,232-237.

Imhoff,S.,Pires da Silva,A.,Dexter,A.,2002.Factors contributing to the tensile strength and friability of oxisols.Soil Sci.Soc.Am.J.66,1656-1661.

Jackson,M.L.,1958.Soil Chemical Analysis.Prentice-Hall,Englewood Cliffs,NJ,p.408.

Keren,R.,Singer,M.J.,1990.Effect of pH on permeability of clay-sand mixture containing hydroxy polymers.Soil Sci.Soc.Am.J.54,1310-1315.

Kögel-Knabner,I.,Guggenberger,G.,Kleber,M.,Kandeler,E.,Kalbitz,K.,Scheu,S.,Eusterhues,K.,Leinweber,P.,2008.Organo-mineral associations in temperate soils:integrating biology,mineralogy,and organic matter chemistry.J.Plant Nutr.Soil Sci.171,61-82.

Lado,M.,Ben-Hur,M.,Shainberg,I.,2004.Soil wetting and texture effects on aggregate stability,seal formation and erosion.Soil Sci.Soc.Am.J.68,1992-1999.

Levy,G.J.,Mamedov,A.I.,2002.High-energy-moisture-characteristic aggregate stability as a predictor for a seal formation.Soil Sci.Soc.Am.J.66,1603-1609.

Li,Z.X.,Cai,C.F.,Shi,Z.H.,Wang,T.W.,2005.Aggregate stability and its relationship with some chemical properties of red soils in subtropical China.Pedosphere 15(1),129-136.

Lu,S.G.,Malik,Z.,Chen,D.P.,Wu,C.F.,2014.Porosity and pore size distribution of ultisols and correlations to soil iron oxides.Catena 123,79-87.

Martins,M.R.,Angers,D.A.,Corá,J.E.,2013.Non-labile plant C contributes to long-lasting macroaggregation of an oxisols.Soil Biol.Biochem.58,153-158.

Mbagwu,J.S.C.,Schwertmann,U.,2006.Some factors affecting clay dispersion and aggregate stability in selected soils of Nigeria.Int.Agrophys.20,23-30.

Mckeague,J.A.,Day,J.H.,1966.Dithionite and oxalate Fe and Al as acids in differentiating various classes of soil.Can.J.Soil Sci.46,13-22.

Mehra,O.P.,Jackson,M.L.,1960.Iron oxides removal from soils and clays by a dithionitecitrate system buffered with sodium bicarbonate.Clay Clay Miner.7,317-327.

Noellemeyer,E.,Frank,F.,Alvarez,C.,Morazzo,G.,Quiroga,A.,2008.Carbon contents and aggregation related to soil physical and biological properties under a land-use sequence in the semiarid region of central Argentina.Soil Tillage Res.99,179-190.

Oades,J.M.,Waters,A.J.,1991.Aggregate hierarchy in soils.Aust.J.Soil Res.29,815-828.

Onweremadu,E.U.,Onyia,V.N.,Anikwe,M.A.N.,2007.Carbon and nitrogen distribution in water-stable aggregates under two tillage techniques in fluvisols of Owerri area,southeastern Nigeria.Soil Tillage Res.97,195-206.

Opara,C.C.,2009.Soil microaggregates stability under different land use types in southeastern Nigeria.Catena 79,103-112.

Peng,X.,Yan,X.,Zhou,H.,Zhang,Y.Z.,Sun,h.,2015.Assessing the contributions of sesquioxides and soil organicmatter to aggregation in an ultisol under long-term fertilization.Soil Tillage Res.146,89-88.

Pinheiro-Dick,D.,Schwertmann,U.,1996.Microaggregates from oxisols and inceptisols:dispersion through selective dissolutions and physicochemical treatments.Geoderma 74,49-63.

Plante,A.F.,McGill,W.B.,2002.Soil aggregate dynamics and the retention of organic matter in a laboratory-incubated soilwith differing simulated tillage frequencies.Soil Tillage Res.66,79-92.

Pronk,G.J.,Heister,K.,Ding,G.C.,Smalla,K.,Kögel-Knabner,I.,2012.Development of biogeochemical interfaces in an artificial soil incubation experiment:aggregation and formation of organo-mineral associations.Geoderma 189-190,585-594.

Shrestha,B.M.,Singh,B.R.,Sitaula,B.K.,Lal,R.,Bajracharya,R.M.,2007.Soil aggregate-and particle-associated organic carbon under different land uses in Nepal.Soil Sci.Soc.Am.J.71,1194-1203.

Six,J.,Bossuyt,H.,De Gryze,S.,Denef,K.,2004.A history of research on the link between(micro)aggregates,soil biota,and soil organic matter dynamics.Soil Tillage Res.79,7-31.

Six,J.,Feller,C.,Denef,K.,Ogle,S.M.,Sa,J.C.d.M.,Albrecht,A.,2002.Soil organic matter,biota and aggregation in temperate and tropical soils-effects of no-tillage.Agronomie 22,755-775.

Statistical Package for the Social Sciences Inc.,2001.SPSS Advanced Statistics 11.0.SPSS Inc.,Chicago.

Sumner,M.E.,1992.The electrical double layer and clay dispersion.In:Sumner,M.E.,Stewart,B.A.(Eds.),Advaced in Soil Science:Soil Crusting,Physical and Chemical Processes.Lewis Publishers,Boca Raton,pp.1-31.

Sumner,M.E.,Miller,W.P.,1996.Cation exchange capacity and exchange coefficients.In:Sparks,D.L.(Ed.),Methods of Soil Analysis.Part 3Chemical Methods 5.ASA and SSSA,Madison,WI,pp.1201-1229.

Wagner,S.,Cattle,S.R.,Scholten,T.,2007.Soil-aggregate formation as influenced by clay content and organic-matter amendment.J.Plant Nutr.Soil Sci.170,173-180.

Wang,J.G.,Li,Z.X.,Cai,C.F.,Yang,W.,Ma,R.M.,Zhang,G.B.,2012.Predicting physical equations of soil detachment by simulated concentrated flow in ultisols(subtropical China).Earth Surf.Process.Landf.37,633-641.

Wuddivira,M.N.,Camps-Roach,G.,2007.Effects of organic matter and calcium on soil structural stability.Eur.J.Soil Sci.58,722-727.

Wuddivira,M.N.,Stone,R.J.,Ekwue,E.I.,2006.Soil texture,clay mineralogy and organicmatter effects on structural stability and hydraulic characteristics of selected Trinidad soils after rainfall.Trop.Agric.83,69-78.

Yan,F.L.,Shi,Z.H.,Li,Z.X.,Cai,C.F.,2008.Estimating interrill soil erosion from aggregate stability of ultisols in subtropical China.Soil Tillage Res.100,34-41.

Yoder,R.E.,1936.A direct method of aggregate analysis of soils and a study of the physical nature of erosion losses.J.Am.Soc.Agron.28,337-351.

Zhang,B.,Horn,R.,2001.Mechanisms of aggregate stabilization in ultisols from subtropical China.Geoderma 99(1-2),123-145.

Zhang,M.K.,Xu,J.M.,2005.Restoration of surface soil fertility of an eroded red soil in southern China.Soil Tillage Res.80(1-2),13-21.

Zhang,M.K.,He,Z.L.,Chen,G.C.,Huang,C.Y.,1997.Formation of water-stable aggregates in red soils as affected by land use.Acta Pedol.Sin.34(4),359-366(in Chinese).

Zhang,B.,Yang,Y.S.,Zepp,H.,2004.Effect of vegetation restoration on soil and water erosion and nutrient losses of a severely eroded clayey plinthudult in southeastern China.Catena 57,77-90.

Zhao,Q.G.,Xu,M.J.,Wu,Z.D.,2000.Agricultural sustainability of red soil region in southeast China.Acta Pedol.Sin.37,433-442(in Chinese).

Zhou,H.,Peng,X.H.,Perfect,E.,Xiao,T.Q.,Peng,G.Y.,2013.Effects of organic and inorganic fertilization on soil aggregation in an ultisol as characterized by synchrotron based Xray micro-computed tomography.Geoderma 195-196,23-30.