SR24180Variable-rate nitrogen fertilisation to improve silage maize yield and crude protein using APSIM modelling
Determining optimum nitrogen (N) fertilisation rates to maximise yields and minimise N losses remains challenging due to uncertainties in future crop N requirements and soil N supply. However, accounting for spatial variability within a field can enhance N fertilisation efficiency. Using the APSIM model, we identified optimal N fertilisation rates for silage maize that maximise both yields and protein concentrations while minimising N losses. Field testing of this approach is required before it can be implemented for practical N fertilisation management.
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