Parts of Danish Agricultural Agency and of Danish Environmental Protection Agency have become Agency for Green Transition and Aquatic Environment. Other parts are part of Danish Agricultural and Fisheries Agency.
The Danish Agency for Agriculture regularly prepares a list of producers and dealers who import or produce fertilisers and soil improvers, etc.
The list is an overview of notified products. It is possible to search the list if you press "Ctrl+F"
Registration of products must take place prior to sale.
You can read about legislation here.
You can read about registered products here.