N losses & turnover rates (Obj 3)
The objectives of this work package are to quantify N losses and turnover rates in areas of dairy pastures highly frequented by livestock. This is being investigated across dairy pastures in both sub-tropical and temperate regions and includes determination of urine N2O emission factors and quantification of N2 losses via the application of stable isotopes. Here, Karina is working with Queensland University of Technology in Brisbane. The information is being used to improve rate constants within the modelling component (objective 4).