Ion exchange properties and mineralogy of soils
Work in this area has focussed on the processes of soil genesis and the impacts that different soil mineralogies may have on the behaviour of soils and their response to management. Particular interest has been in soils derived from volcanic ash (Morrison 1991; Naidu et al, 1997) and soils on Pacific atolls (Morrison, 1990; Woodroffe and Morrison, 2001; Morrison and Manner 2005). The other major focus has been on how soils will respond to various management practices, particularly the surface charge properties which are critical for understanding how soils change with liming (Morrison et al, 1989), fertilisation (Gawander et al, 2004) and erosion (Morrison and Clarke, 1990). This work has included theoretical (Gangaiya and Morrison, 1987) as well as practical investigations.
References
P. Gangaiya and R.J. Morrison, 1987. A review of the problems associated with applying the terms surface charge and zero point of charge to tropical soils. Comm. Soil Sci. Pl. Anal.,18, 1131-1151..
R.J. Morrison, R. Naidu, P. Gangaiya and Yee Wah Sing, 1989. Amelioration of acid soils in Fiji. In: E. Pushparajah and C.R. Elliot (Editors) Soil Management and Smallholder Development in the Pacific Islands. IBSRAM, Bangkok, pp 255-270.
R.J. Morrison, 1990. Pacific atoll soils: chemistry, mineralogy and classification. Atoll Research Bulletin, 339, 1-25.
R.J. Morrison, 1991. Some andisols from Savai”I, Western Samoa. Soil Sci. Soc. Amer. J. 55, 159-164.
R.J. Morrison and W.C. Clarke, 1990. Soil erosion in Fiji - problems and perspectives. J. Erosion Control Engineering Society of Japan, 43(2), 54-59.
R.Naidu, R.J. Morrison, L. Janik and M. Asghar, 1997. Charge characteristics of basaltic soils from Western Samoa. Clay Minerals, 32, 545-556.
C.D. Woodroffe and R.J. Morrison, 2001. Reef-island accretion and soil development on Makin, Kiribati, Central Pacific. Catena, 44, 245-261.
J.S. Gawander. P Gangaiya and R.J. Morrison, 2004. Potassium responses and budgets in the growth of sugarcane in Fiji. Sugar Cane International, 22, 3-8.
R.J. Morrison and H.I. Manner, 2005. The pre-mining pattern of soils on Nauru, Central Pacific. Pacific Science, 59, 523-540.
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