Break-crop effects on wheat production across soils and seasons in a semi-arid environment

摘要: In low-rainfall environments, a high frequency of cereal crops has been favoured for optimising productivity and risk. However, cereals at intensity often lead to declining water-use efficiency increasing inputs cope with emergent nutritional, disease weed problems. The value including breaks in the cropping sequence can involve level uncertainty areas where non-cereal are more risky profitability is largely determined by subsequent benefit productivity. this study, we aimed improve understanding magnitude primary source break benefits such as nutrition, water management environment within-field soil variability also contribute about breaks. on-farm field experiments near Karoonda South Australian Mallee, were grown 2009 or 2010 on four distinct types across dune–swale catena. effect these production was measured up 3 years. addition, nutrition available, along infection crops, explored actual yields compared nitrogen water-limited potential yields. Consistent cumulative least 1 t ha–1 after years accrue from different types. inclusion had beneficial effects cycling supply nutrients some short-term impacts Rhizoctonia solani AG8 cereals, whereas there no conclusive crops. This study suggests that both legume brassica likely be factor limiting low-rainfall, semi-arid environments.