![]() ![]() Partial budgets showed that under average commodity prices, grazing a wheat crop could be more profitable 40–75% of the time on poorer soil types in lower rainfall environments. Grazing earlier necessitated lighter stocking rates but surprisingly had little benefit for animal performance. Dynamic simulations of grazing showed that livestock production increased as grazing was delayed stocking rate had little impact at this time. ![]() We then simulated wheat quality and livestock production on spring wheat grazed at different stages of crop development and at a range of stocking rates. This was simulated for a factorial of soil types and locations varying in mean annual rainfall. First, we developed a simple partial budget calculation to estimate and compare revenue from grain or grazing alternatives using data for grain yield and standing biomass at flowering. This simulation study used two APSIM (Agricultural Production Systems Simulator)-based approaches to investigate the circumstances under which more revenue might be obtained by sacrificing a wheat crop for grazing rather than harvesting it for grain in Western Australia’s grainbelt. ![]() Failing grain crops are sometimes sacrificed for grazing by mixed farmers, a decision involving a complex range of factors.
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