Evaluation Planty Organic 2012-2020 : plant-based fertilizer: nitrogen and organic matter

Summary

Situated on the SPNA experimental farm Kollumerwaard, from 2012 up to 2020 the Planty Or-ganic experiment was run: and organic arable farming system based on 100% nitrogen in-put by means of leguminous plants. Soil, crops, green manures and Cut&Carry fertilizers were measured. In 2019 and 2020 six more fields were monitored from the Kollumerwaard organic business unit, the Kollumerwaard Conventional business unit and a nearby situated organic farm, thus enabling system comparisons. All data were used to create in total 12 field scenarios in the Ndicea App. In case of Planty Organic, KW Organic and KW Conventional the model scenarios were good enough to be transformed into Ndicea scenarios on rotation level. These three scenarios are used to com-pare results such as input-output, nitrogen losses, nitrogen use efficiency, organic matter dy-namics and field-internal dynamics.