describing how environmental factors (for example, climate, soil, landform and water), can support higher crop yields and investigating the environmental constraints on agricultural production in Australia (for example, soil moisture, water resources and soils)
investigating how high crop yields (for example, from wheat, rice and maize) around the world are related to factors such as irrigation, accessibility, labour supply, landforms and agricultural technologies (for example, high-yielding varieties)
evaluating the ways that agricultural innovations have changed some of the environmental limitations on and impacts of food production in Australia