September 2025 Release

This post outlines the September 2025 updates of the FDM libraries: @svenvw/fdm-app, @svenvw/fdm-calculator, @svenvw/fdm-core, and @svenvw/fdm-data. This release introduces a wide range of improvements across the application, calculation engine, and data management, focusing on enhanced user experience, improved performance, and expanded functionality.

FDM Application Enhancements (@svenvw/fdm-app)

The FDM application receives significant updates aimed at improving usability and providing more comprehensive farm management tools.

• New Farm Dashboard: A new farm dashboard page offers an intuitive overview of your farm, with quick links to various applications, data pages, and essential actions.
• Advanced Field Table: A new page introduces an advanced table for farm fields, featuring robust search capabilities (by field name, cultivations, and fertilizers) and multi-selection for streamlined fertilizer application to multiple fields.
• Bulk Fertilizer Application: A dedicated new page allows users to apply fertilizer to multiple fields simultaneously, greatly enhancing efficiency.
• Productive Fields Toggle: A new toggle enables users to filter and display either all fields or only productive fields on various list pages, providing more focused views.
• Improved Farm Creation Wizard:
  • Cultivations in the bouwplan are now sorted by descending total area, offering a more logical presentation.
• Enhanced Organization Invitations: Organization invitation emails now include direct accept and reject buttons, simplifying the invitation management process for invitees.
• Streamlined Custom Fertilizer Creation: From the fertilizer application form, users can now easily navigate to a new page to add custom fertilizers. Upon successful submission, they are automatically redirected back to the application form.
• Timezone-Aware Magic Links: The timestamp in magic link emails now intelligently displays the user's local timezone, where determinable, for improved clarity.
• Farm Deletion Feature: Users can now delete a farm directly from the farm settings page, providing full control over their farm data.
• Map Centering on Field Selection: When reviewing newly created fields or viewing individual fields on the map, the map now automatically centers on the selected field, enhancing navigation and focus.
• Improved Error Handling in Norms: In norms calculations, fields with errors now display specific error messages on their respective cards, alongside a general page-level error. Successfully calculated fields continue to render, ensuring partial results are still visible.

FDM Calculator Upgrades (@svenvw/fdm-calculator)

The FDM calculator receives crucial updates for more accurate and efficient nitrogen management.

• Flexible Nitrogen Usage Norms (stikstofgebruiksnormen): Support has been added for cultivations with different nitrogen usage standards for the first and subsequent years, allowing for more nuanced calculations.
• Improved Derogation-Free Zone Handling: The dierlijke mest gebruiksnorm calculation has been enhanced to explicitly account for derogation-free zones. This ensures more accurate compliance with specific regional regulations. Previously, these zones were identified as Natura2000-zones; while the calculated norm remains the same, the description is now more precise.
• Performance Enhancements:
  • Vector lookups of remote datasets in norms calculations have been replaced with more efficient raster queries, significantly improving performance and reliability.
  • Nitrogen balance calculations for multiple fields are now organized into batches, preventing system overload and improving overall responsiveness.
  • Fertilizer supply calculations in the nitrogen balance have been optimized to iterate over each application only once, boosting performance.
  • Deposition values are now retrieved more efficiently from remote GeoTIFFs through batched requests and caching, leading to faster nitrogen balance calculations.
  • Ammonia emissions calculations from fertilizer applications in the nitrogen balance have been optimized to iterate over each application only once.
• Bug Fixes:
  • An exception when calculating stikstofgebruiksnorm for cultivations with sub_types has been fixed.
  • An exception at calculating stikstofgebruiksnorm when a potato crop has no variety provided has been fixed.

FDM Core Developments (@svenvw/fdm-core)

Core functionalities have been expanded to provide more robust data management and authorization.

• Farm Deletion Logic: The removeFarm function has been added to facilitate the complete deletion of a farm and all its associated data.
• Productivity Flag for Cultivations: b_isproductive has been added to the output of getCultivationPlan, providing insights into field productivity.
• Enhanced Field Data Exposure: b_perimeter and b_isproductive are now exposed in the output of getField and getFields, offering more detailed field information.
• Farm Deletion Authorization: The isAllowedToDeleteFarm function has been added to verify if a principal has the necessary rights to delete a farm.
• Magic Link Timeout: The magic link email timeout has been set to 15 minutes for improved security and user experience.
• Fertilizer Application Date Fix: The p_app_date field in FertilizerApplication has been updated to no longer allow null values, ensuring data consistency.

FDM Data Updates (@svenvw/fdm-data)

Data management receives minor but important updates for consistency and accuracy.

• Ammonia Emission Factor (p_ef_nh3): p_ef_nh3 has been added to the synced values for the baat catalogue.
• Ammonia Emission Factor Unit Fix: The unit of p_ef_nh3 has been corrected to be a fraction instead of a percentage, ensuring accurate calculations.

---

These updates reflect our ongoing commitment to providing a robust and comprehensive platform for farm data management. We encourage you to explore these new features and welcome any feedback or contributions on our GitHub repository.