References
Adams, W.A., (1973). The effect of organic matter on the bulk and true densities of some uncultivated podzolic soils. Journal of Soil Science. 24, 10-17 . http://www.nrel.colostate.edu/projects/century5/reference/html/Century/submodel-layeredsoil.htm
Altieri, M.A. (2006) Agroecology: principles and strategies for designing sustainable farming systems. University of California, Berkeley. http://www.cnr.berkeley.edu/~agroeco3/principles_and_strategies.html
Briske, D. D., and R. K. Heitschmidt. (1991). An ecological perspective.Grazing Management: An Ecological Perspective. R. K. Heitschmidt and J. W. Stuth, ed. Timber Press, Portland.
Carr, A.J.L. (1997). Innovation of Diffusion: Information exchange and landholder groups. Resource and Environmental Studies Number 15, Centre for Resource and Environmental Studies, ANU.
Freeman, C. (2006). Horticulture Natural Resource Management Initiative: NSW Central Coast Pilot Project. Report to Horticulture Australia Ltd (unpublished).
Heisswolf, S., Lindsay, S., Bagshaw, J. and Vock, N. (2003). New experiences in working with horticultural farmers to improve NRM practices in Queensland. Proceedings Australasia Pacific Extension Network. Published online by The Regional Institute Ltd. http://www.regional.org.au/au/apen/2003/2/110heisswolfs.htm
Killham, K. 1994. Soil Ecology. Cambridge.
Manske, L.L. 2004. Biologically effective grazing management. Dickinson Research Extension Centre, North Dakota State University. http://www.ag.ndsu.nodak.edu/dickinso/research/2003/range03a.htm
Norton, B., 2002. Production-oriented conservative-impact grazing management. West Australian Department of Agriculture.
Pannell, D.J. & Schilizzi, S. (2001). Sustainable Agriculture: a question of ecology, equity, economic efficiency or expedience? SEA Working Paper 97/01, GRDC. http://cyllene.uwa.edu.au/~dpannell/dpap975f.htm
Pannell, D.J., Marshall, G.R., Barr, N., Curtis, A., Vanclay, F. and Wilkinson, R. (2005). Understanding and promoting adoption of conservation technologies by rural landholders. Unpublished manuscript, submitted to Australian Journal of Experimental Agriculture, http://www.general.uwa.edu.au/u/dpannell/dp0502.htm
Reijntjes, C.B., Haverkort and A. Waters-Bayer. (1992). Farming for the future. MacMillan Press Ltd., London.
Ripl, W. and Wolter, K-D. (2002). Ecosystem function and degradation. In: P.J. le B. Williams, d.R. Thomas and C.S. Reynolds (eds.): Phytoplankton productivity: Carbon assimilation in marine and freshwater systems. Blackwell, Oxford. Pp 291-317.
Southorn, N. and Cattle, S. (2004). The dynamics of soil quality in livestock grazing systems. The Regional Institute.
www.regional.org.au/au/asssi/supersoil2004/s14/oral/1789-southornn.htm
Vanclay, F. (2004). Social principles for agricultural extension to assist in the promotion of natural resource management. Australian Journal of Experimental Agriculture, 44, pp 213-222.
Youl, R., Mabben, S. and Nabben, T. (2006). Landcare in Australia: founded in local action. First published October 1998; revised 1999, 2000 and 2001. This revision released in October 2006 and funded by the authors and colleagues.



