Overview
This guide explains how the FDM Calculator determines the official Dutch legal usage norms (gebruiksnormen) for 2026. These calculations are essential for ensuring your farm management plan complies with national environmental regulations.
Dierlijke mest gebruiksnorm
This document explains how the FDM Calculator determines the official Dutch legal usage norm (gebruiksnorm) for nitrogen from animal manure in 2026, and how applied animal manure counts towards this norm (the filling).
Fosfaatgebruiksnorm
This document provides a detailed explanation of the Dutch legal usage norm (gebruiksnorm) for phosphate in 2026. It covers how the norm is calculated and how the amount of applied phosphate counts towards this norm (opvulling), including the reduced counting percentages for organic-rich fertilizers.
Renure gebruiksnorm
This document explains the Renure usage norm (gebruiksnorm), which is new in 2026, and how applied Renure products count towards it (opvulling).
Stikstofgebruiksnorm
This document provides a detailed explanation of the Dutch legal usage norm (gebruiksnorm) for nitrogen in 2026. It covers how the norm is calculated, the rules for catch crops and winter crops, and how the applied nitrogen counts towards this norm (opvulling).