Appi-N
The APPI-N method is based on real-time monitoring of wheat nutrition and the triggering of topdressing N applications when conditions are favourable for a good N use efficiency. It was designed to overcome the limitations of the forecast balance method, which is widely used in France
The method does not take into account two pillars of the balance sheet method: the yield target and the measurement of soil mineral N at the end of winter. It is rather based on dynamic reasoning throughout the crop cycle, based on monitoring an indicator (nitrogen nutrition index, NNI) and NNI trajectories, tolerating nitrogen deficiencies and aiming for high yields and grain protein levels, as well as low nitrogen losses
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| Name in original language | Appi-N |
| Name in English | Appi-N |
| Designer/ manufacturer | INRAE |
| Accessibility | Free |
| Weblink | https://oad.agronomie.inrae.fr/appin/ |
| Countries of primary use | France |
| Main language | French |
| Other languages available | None |
| Brief description of the tool | The APPI-N method is based on real-time monitoring of wheat nutrition and the triggering of topdressing N applications when conditions are favourable for a good N use efficiency. It was designed to overcome the limitations of the forecast balance method, which is widely used in France |
| Target user | Advisors and Farmers |
| Target crops | Wheat |
| Type of tool | Desk/computer based tool |
| The tool assesses or provides guidance on | Nutrient recommendation |
| Nutrients assessed | Nitrogen (N) |
| The tool relies on a base recommendation system | No |
| The assessment frequency should be | Once per week during set growth stages |
| Required data input is | Crop, Farm location, Growth stage |
| The data can be imported from other tools and systems | Yes |
| The tools main output format is | Value in tool |
| Data can be exported | Yes |
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Funded by the European Union and UK Research and Innovation (UKRI). Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union, European Commission or UKRI. Neither the European Union, European Commission nor UKRI can be held responsible for them.
Project Coordinators
Sarah Kendall
sarah.kendall@adas.co.ukSpyros Fountas
sfountas@aua.grheurope.nutrichecknet@gmail.com
Project Partners
