References
- Carrasco , M.A. and Sadzawka , M.A. Importancia del pH en suelos chilenos derivados de cenizas volcánicas . Cong. Int. de Suelos Volcánicos. Tenerife . pp. 85 – 100 . Tenerife , , Spain : Universidad de La Laguna .
- Espinoza , W. , Gast , R.G. and Adams , R.S. 1975 . Charge characteristics and nitrate retention by two Andepts from South‐Central Chile . Soil Sci. Soc. Amer. Proc. , 39 : 842 – 846 .
- Fernández Caldas , E. , González Batista , A. and Hernández Moreno , J. 1980 . La tipología de los suelos y sus características electroquímicas . An. de Edafol. y Agrobiol. , 39 : 1835 – 1843 .
- Gallez , A. , Juo , A.S.R. and Herbillon , A.J. 1976 . Surface and charge characteristics of selected soils in the tropics . Soil Sci. Soc. Am. J. , 40 : 601 – 608 .
- Hendershot , W.H. and Lavkulich , L.M. 1978 . The use of Zero Point of Charge (ZPC) to assess pedogenic development . Soil Sci. Soc. Am. J. , 42 : 468 – 472 .
- Iñiguez , J. and Val , R.M. 1982 . Variable charge characteristic of Andosols from Navarre, Spain . Soil Sci. , 133 : 390 – 396 .
- Laverdiere , M.R. and Weaver , R.M. 1977 . Charge characteristics of Spodic Horizons . Soil Sci. Soc. Am. J. , 41 : 505 – 510 .
- Parks , G.A. 1967 . Aqueous surface chemistry of oxides and complex oxide minerals. Isoelectric point and zero point of charge , Advances in Chemistry series 67 Edited by: Gould , R.F. 121 – 160 .
- Radcliffe , D.J. and Gillman , G.P. Surface charge characteristics of volcanic ash soils from the southern highlands of Papua New Guinea . Cong. Int. de Suelos Volcánicos. Tenerife . pp. 164 – 193 . Tenerife , , Spain : Universidad de La Laguna .
- Segalen , P. 1968 . Note sur une méthode de determination des produits mineraux amorphes . Cahiers Orstom, Pedologie , 1 : 105
- Uehara , G. and Gillman , G. 1980 . Charge characteristics of soils with variable and permanent charge minerals . Soil Sci. Soc. Am. J. , 44 : 250 – 252 .
- Uehara , G. and Gillman , G. 1981 . The mineralogy, chemistry, and physics of tropical soils with variable charge clays , Boulder , CO : Westview Press .
- Van Raij , B. and Peech , M. 1972 . Electrochemical properties of some Oxisols and Alfisols of the tropics . Soil Sci. Soc. Amer. Proc. , 36 : 587 – 593 .
- Wada , K. 1985 . The distinctive properties of Andosols . Adv. in Soil Sci , 2 : 173 – 229 .
- Walkley , A. and Black , I.A. 1934 . An examination of the Degt‐jareff method for determining soil organic matter and a proposed modification of the chromic acid titration method . Soil Sci. , 37 : 29 – 38 .