Mechanical dispersion of clay from soil into water: readily-dispersed and spontaneously-dispersed clay

• Autorzy: Czyz E. A. , Dexter A. R.
• Języki publikacji: EN

Abstrakty

EN

A method for the experimental determination of the amount of clay dispersed from soil into water is described. The method was evaluated using soil samples from agricultural fields in 18 locations in Poland. Soil particle size distributions, contents of organic matter and exchangeable cations were measured by standard methods. Sub-samples were placed in distilled water and were subjected to four different energy inputs obtained by different numbers of inversions (end-over-end movements). The amounts of clay that dispersed into suspension were measured by light scattering (turbidimetry). An empirical equation was developed that provided an approximate fit to the experimental data for turbidity as a function of number of inversions. It is suggested that extrapolation of the fitted equation to zero inversions enables the amount of spontaneously-dispersed clay to be estimated. This method introduces the possibility of replacing the existing subjective, qualitative method of determining spontaneously-dispersed clay with a quantitative, objective method. Even though the disper-sed clay is measured under saturated conditions, soil samples retaina ‘memory’ of the water contents at which they have been stored.

Słowa kluczowe

EN

mechanical dispersion; clay; soil; water; readily-dispersed clay spontaneously-dispersed clay

• Wydawca: -
• Czasopismo: International Agrophysics
• Rocznik: 2015
• Tom: 29
• Numer: 1
• Opis fizyczny: p.31-37,fig.,ref.

Twórcy

autor

Czyz E. A.

• Department of Soil Science, Environmental Chemistry and Hydrology, University of Rzeszow, Zelwerowicza 8b, 35-601 Rzeszow, Poland

autor

Dexter A. R.

• Institute of Soil Science and Plant Cultivation (IUNG-PIB), Czartoryskich 8, 24-100 Pulawy, Poland

Bibliografia

• AS, 2006. Methods for testing soils for engineering purposes. Standards Australia, Sydney, NSW 2000, Australia.
• ASTM, 2014. Standard test methods for determining dispersion characteristics of clayey soils by the crumb test. ASTM International, West Conshohocken, PA, USA.
• Brubaker B.C., Holzhey C.S., and Brasher B.R., 1992.
• Estimating the water-dispersible clay content in soils. Soil Sci. Soc. Am. J., 56(4), 1226-1232.
• Caron J., Kay B.D., and Stone J.A.,1992. Improvement of structural stability of clay loam with drying. Soil Sci. Soc. Am. J., 56(5), 1583-1590.
• Chan K.Y., 1989. Effect of tillage on aggregate strength and aggregation of vertisols. Soil Till. Res., 13, 163-175.
• Czyż E.A. and Dexter A.R., 2009. Soil physical properties as affected by traditional, reduced and no-tillage for winter wheat. Int. Agrophysics, 23, 319-326.
• Czyż E A. and Dexter A.R., 2011. Turbidity. In: Encyclopedia of Agrophysics (Eds J. Gliński, J. Horabik, and J. Lipiec), Springer Science, Dordrecht, The Netherlands, 938-940.
• Czyż E.A., Dexter A.R., and Gaţe O.P., 2010. Determination of soil stability in relation to ecological agriculture. In: Selected Problems of Soil Tillage Systems and Operations (Eds P.F. Borowski, M. Klimkiewicz and M.J. Powalka), Warsaw University of Life Sciences, WEMA Press, Warsaw, Poland.
• Czyż E.A., Dexter A.R., and Terelak H., 2002. Content of readily- dispersible clay in some Polish soils. In: Sustainable Land Management – Environmental Protection (Eds M. Pagliai, R. Jones), Advances in Geoecology, 35, 115-124.
• Czyż E.A. and Vizitiu O.P., 2012. Soil physical quality in relation to readily-dispersible clay, friability and saturated hydraulic conductivity. In: Practical Applications of Environmental Research (Eds J. Kostecka, J. Kaniuczak), Science for Economy, University of Rzeszów, Poland.
• Dagesse D.F., 2013. Freezing cycle effects on water stability of soil aggregates. Can. J. Soil Sci., 93(4), 473-483.
• Dexter A.R. and Czyż E.A., 2000a. Effects of soil management on the dispersibility of clay in a sandy soil. Int. Agrophysics, 14, 269-272.
• Dexter A.R. and Czyż E.A., 2000b. Clay content of drainage water as affected by soil factors (Eds W.D. Reynolds, C.F. Drury, C.S. Tan). Proc. 4th EasternAugust 23-25, Leamington, Ontario, Canada.
• Dexter A.R., Richard G., Czyż E.A., Davy J., Hardy M., and Duval O., 2011. Clay dispersion from soil as a function of antecedent water potential. Soil Sci. Soc. Am. J., 75, 444-455.
• Dexter A.R. and Watts C.W., 2000. Tensile strength and friability. In: Soil and Environmental Analysis: Physical Methods, (Eds K.A. Smith, C.E. Mullins). Dekker Press, New York, USA.
• Emerson W.W., 1967. A classification of soil aggregates based on their coherence in water. Aust. J. Soil Res., 5, 47-57.
• Gaţe O.P., Czyż E.A., and Dexter A.R., 2004. Effects of readily-dispersible clay on soil quality and root growth. In: Plant Growth in Relation to Soil Physical Conditions (Eds J. Lipiec, R. Walczak, G. Józefaciuk), Institute of Agrophysics Polish Academy of Science, Lublin, Poland.
• Kay B.D. and Dexter A.R., 1992. The influence of dispersible clay and wetting/drying cycles on the tensile strength of a red-brown earth. Aust. J. Soil Res., 30, 297-310.
• Loveday J. and Pyle J., 1973. The Emerson dispersion test and its relationship to hydraulic conductivity. Division of Soils Technical Paper, CSIRO, Melbourne, Australia.
• Patterson D.E., Chamen W.C.T., and Richardson C.D., 1980. Long-term experiments with tillage systems to improve the economy of cultivations for cereals. J. Agric. Eng. Res., 25, 1-36.
• Quirk J.P., 1986. Soil permeability in relation to sodicity and salinity. Phil. Trans. Roy. Soc. Lond., A316, 297-317.
• Shanmuganathan R.T. and Oades J.M., 1982. Effect of dispersible clay on the physical properties of the B horizon of a redbrown earth. Aust. J. Soil Res., 20, 315-324.
• Vizitiu O., Czyż E.A., and Dexter A.R., 2010. Soil Physical Quality – Theory and Applications for Arable Soils. SITECH, Craiova, Romania.
• Watts C.W. and Dexter A.R., 1997. The influence of organic matter in reducing the destabilization of soil by simulated tillage. Soil Till. Res., 42, 253-275.
• Watts C.W., Dexter A.R., Dumitru E., and Arvidsson J., 1996a. An assessment of the vulnerability of soil structure to destabilization during tillage. Part I. A laboratory test. Soil Till. Res., 37, 161-174.
• Watts C.W., Dexter A.R., Dumitru E., and Canarache A., 1996b. Structural stability of two Romanian soils as influenced by management practices. Land Degradation Develop., 7, 217-238.
• Watts C.W., Dexter A.R., and Longstaff D.J., 1996c. An assessment of the vulnerability of soil structure to destabilization during tillage. Part II – Field trials. Soil Till. Res., 37,175-190.

Identyfikatory

DOI

10.1515/intag-2015-0007