Journal article

Environmental risk analysis of farming systems in a semi-arid environment: effect of rotations and management practices on deep drainage

CGH Diaz-Ambrona, GJ O'Leary, VO Sadras, MG O'Connell, DJ Connor

Field Crops Research | ELSEVIER | Published : 2005


We investigated the impact of crop rotations and management practices on the water balance of farming systems in a semi-arid region of south-eastern Australia, where drainage beyond the root zone and rising water tables contribute to salinisation of soils and water streams. The CropSyst model was locally tested and used with long-term weather data to analyse the risk of deep drainage associated with alternative farming practices; water balances were estimated using both cascade and finite difference approaches. Model estimates were compared with (a) yield, biomass, phenology, soil water content and water use measured in a 5-year experiment involving two rotations, i.e. FWP (fallow-wheat-pea)..

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