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2016 - Khaembah & Brown - Overseer crop module testing – end of project report

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The final report from an assessment of OVERSEER nitrogen-loss estimates by for crop systems. 

The project was sponsored by Overseer Limited, the Foundation for Arable Research (FAR) and the Vegetable Research and Innovation Board (represented by Horticulture New Zealand). The project was undertaken by the New Zealand Institute for Plant & Food Research Limited (PFR).

 In consultation with the testers, three recommendations have been prioritised for progress by the project sponsors including: 

1. Expanding the current test set to disentangle soil and climate effects.  

2. Investigate the causes of differences in the water balance results. 

3. Investigate specific areas of the Nitrogen model including:   

  • Residual decomposition methods.  
  • Mechanisms for parameterising and modelling soil organic matter mineralisation.  

This report directly contributed to subsequent updates to the model in the cropping space, particularly the model version updates v6.4.1, v6.5.0 and v6.5.1 

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