John M, Pannell D, Kingwell R (2005) Climate change and the economics of farm management in the face of land degradation: dryland salinity in Western Australia. IOCI (2005) IOCI reports key findings of recent research into south-western climate, bulletin no. IOCI (2002) Indian Ocean climate initiative: climate change in south west western Australia. CSIRO Sustainable Ecosystems, Canberra Australia Howden SM, Reyenga PJ, Meinke H (1999) Global change impacts on Australian wheat industry report to the Australian greenhouse office. Hochman Z, Van Rees H, Carberry PS, Holzworth D, Dalgliesh NP, Hunt J, Poulton PL, Brennan LE, Van Rees S, Huth NI, Peake AS, McCown RL (2008) Yield Prophet ® an Internet-enabled simulation-based system to assist farmers reduce risk in Australia’s drought prone environments. Australian Government Publishing Service, Canberra, Australia, p 141 Hamblin A, Kyneur G (1993) Trends in wheat yields and soil fertility in Australia. George R, McFarlane D, Nulsen B (1997) Salinity threatens the viability of agriculture and ecosystems in Western Australia. The relation between yield, water use and climate. Int J Clim 27:1547–1578įrench RJ, Schultz JE (1984) Water use efficiency of wheat in a Mediterranean-type environment. Agric Syst 74:141–177įowler HJ, Blenkinsop S, Tebaldi C (2007) Linking climate change modelling to impacts studies: recent advances in downscaling techniques for hydrological modeling. Aust J Agric 3:62–65Ĭarberry PS, Hochman Z, McCown RL, Dalgliesh NP, Foale MA, Poulton PL, Hargreaves JNG, Hargreaves DMG, Cawthray S, Hillcoat N, Robertson MJ (2002) The FARMSCAPE approach to decision support: farmers’, advisers’, researchers’ monitoring, simulation, communication and performance evaluation. Field Crops Res 57:163–179īelford RK, Dracup M, Tennant D (1991) Waterlogging limits crop growth on duplex soils. Field Crops Res 85:85–102Īsseng S, Keating BA, Fillery IRP, Gregory PJ, Bowden JW, Turner NC, Palta JA, Abrecht DG (1998b) Performance of the APSIM-wheat model in Western Australia. Aust J Agric Res 49:363–377Īsseng S, Jamieson PD, Kimball B, Pinter P, Sayre K, Bowden JW, Howden SM (2004) Simulated wheat growth affected by rising temperature, increased water deficit and elevated atmospheric CO 2. Aust J Agric Res 52:45–56Īsseng S, Fillery IRP, Anderson GC, Dolling PJ, Dunin FX, Keating BA (1998a) Use of the APSIM wheat model to predict yield, drainage, and NO \(_\) leaching for a deep sand. Eur J Agron 12:37–54Īsseng S, Fillery IRP, Dunin FX, Keating BA, Meinke H (2001) Potential deep drainage under wheat crops in a Mediterranean climate. Canberra ACT, pp 538–543Īsseng S, Keulen H, Stol W, van Keulen H (2000) Performance and application of the APSIM Nwheat model in the Netherlands. In: McDonald AD, McAleer M (eds) MODSIM ‘97 Proceedings of the international congress on modelling and simulation modelling and simulation society of Australia, vol 2. Plant Soil 256:217–229Īsseng S, Keating BA, Huth NI, Eastham J (1997) Simulation of perched watertables in a duplex soil. Aust J Agric Res 49:345–361Īsseng S, Van Herwaarden AF (2003) Analysis of the benefits to wheat yield from assimilates stored prior to grain filling in a range of environments. The findings will have significant implications for estimates of future climate change impacts in this region with changes in rainfall causing non-proportional impacts on production and hydrological aspects, such as deep drainage and waterlogging, where proportionality is often presumed.Īnderson GC, Fillery IRP, Dunin FX, Dolling PJ, Asseng S (1998) Nitrogen and water flows under pasture–wheat and lupin–wheat rotations in deep sands in Western Australia-2. These results were due to the rainfall changes mainly occurring in June and July, a period when rainfall often exceeds crop demand and large amounts of water are usually lost by deep drainage. At the same time, simulated drainage decreased by up to 95% which will significantly reduce the spread of dryland salinity. Despite the large decline in rainfall, simulated yields based on the actual weather data did not fall. We used the ASPIM-Nwheat model in combination with historic climate data to study the impact of recent climate change on the hydrology and production of wheat based farming systems by comparing results for before and after 1975. Across nine sites, growing season rainfall (May to October) decreased by an average of 11% and the sum of rainfall in June and July (June + July) decreased by 20%. Since the mid 1970s the region has experienced a significant decrease in winter rainfall. Due to clearing of native vegetation, dryland salinity is a major problem in south-west Australia. The main factor limiting plant production in this region is rainfall. The wheatbelt of Western Australia shows a distinct Mediterranean climate with most of the rainfall occurring in the winter months.