Since routine direct measurements of nitrogen (N) losses at an appropriate scale are currently unfeasible, a modelling tool that can be used to assess losses, both actual and potential, from farming systems is therefore needed.
We present the upgraded N balance module for cropping systems (OVCrop) developed to be incorporated into the OVERSEER† Nutrient Budgets model.
The intended use of the OVCrop is to help on-farm nutrient management and to demonstrate future compliance to N leaching regulations. OVCrop is a robust tool, simple enough to be used by people with a low to medium level of expertise, such as farmers and regional councils.
R Cichota, H Brown, VO Snow, DM Wheeler, D Hedderley, R Zyskowski & S Thomas (2010).
A nitrogen balance model for environmental accountability in cropping systems, New Zealand Journal of Crop and Horticultural Science, 38:3, 189-207.
https://doi.org/10.1080/01140671.2010.498401