1. ABS, 2002. Salinity on Australian Farms 2002. Australian Bureau of Statistics Catalogue No. 4615.0, Canberra.
2. ABS, 2006. Agricultural Commodities, 2005-06, Australia Australian Bureau of Statistics Catalogue No. 7121.0, Canberra.
3. ABS, 2010a. Year Book Australia, 2009–10. Australian Bureau of Statistics Catalogue No. 1301.0, Canberra.
4. ABS, 2010b. Agricultural Commodities, 2008–09, Australia Australian Bureau of Statistics Catalogue No. 7121.0, Canberra.
5. Nitrogen supply and demand in Australian agriculture;Angus;Aust. J. Exp. Agric.,2001