Ever since they started cultivating crops and keeping stock, primary producers in Australia have been adapting to the vagaries of weather and markets. As 2011 has demonstrated, the challenges presented by events such as drought, storm and flood can make it extremely difficult to achieve a consistent income. Therefore, it is common for primary producers to experience fluctuating incomes, and this has the potential to create a significant tax liability during bumper harvests, and inadequate cash flow when seasons are tougher.