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<br />DeBano, L.F., and Letey, J., eds., 1969, Water-repellent soils: University of <br />California, Riverside, May 6-10, 1968, Proceedings, 354 p. <br />The papers listed below are those included in this symposium. Only those marked with <br />asterisks have been annotated, and occur as individual entries throughout this document. In <br />addition to the papers listed, this publication summarizes a general discussion at the end of <br />the meeting in which the use of terminology was discussed. It was concluded that the term, <br />"water-repellent", is more appropriate than the term, "hydrophobic", when referring to soil <br />properties. However, the latter can be used to describe substances that affect a soil's <br />wettability. <br /> <br />Session I - Distribution of Water-Repellent Soils: <br />*Bond, R.D. The occurrence of water-repellent soils in Australia. <br />Van't Woudt, B.D. Resistance to wettlng under tropical and subtropical conditions. <br />Jamison, V.c. Wettlng resistance under citrus trees in Florida. <br />*DeBano, L.F. Observations on water-repellent soils in western United States. <br />*Holzhey, C.S. Water-repellent soils in Southern Califomia. <br /> <br />Session II - Characterizing Soil Water Repellency: <br />*Letey,]. Measurement of contact angle, water drop penetration time, and critical <br />surface tension. <br />*Hammond, L.c., and Yuan, T.L. Methods of measuring water repellency of soils. <br /> <br />Session III - Water Movement in Water-Repellent Soils: <br />*DeBano, L.F. Water movement in water-repellent soils. <br />*Brandt, G.H. Water movement in hydrophobic soils: <br />Gardner, H.R. Effects of hexadecanol and organic matter extract on soil. <br />*Hussain, S.B., Skau, C.M., Bashir, S.M., and Meeuwig, R.O. Infiltrometer studies of <br />water-repellent soils on the east slope of the Sierra Nevada. <br /> <br />Session IV - Modification of Soil Wettability -- Increasing Soil Wettability: <br />Black, W. Basic chemistry of surface-active agents <br />Valoras, N. Surfactant adsorption by soil materials <br />*Cory, J .T. and Morris, R. J. Factors restricting infiltration rates on decomposed <br />granitic soils. <br />Watson, c.L. Hydraulic conductivity of soil as influenced by surfactants. <br />Mustafa, M.A. Nonionic surfactant effect upon soil aggregate stability. <br />*Krammes, ].S. and Osborn,]. Water-repellent soils and wettlng agents as factors <br />influencing erosion. <br /> <br />Session V - Modification of Soil Wettability - Decreasing Soil Wettability: <br />*Bozer, KB., Brandt, G.H., and Hemwall, ].B. Chemistry of materials that make <br />soils hydrophobic. <br />Brandt, G.H. Soil physical properties altered by adsorbed hydrophobic materials. <br />Fink, D.H.' and Myers, L.E. Synthetic hydrophobic soils for harvesting <br />precipitation. <br />Savage, S.M. Contribution of some soil fungi to water repellency in soils materials. <br /> <br />11 <br />