Documented evidence is available to demonstrate that a food safety and environmental risk assessment for the use of organic fertilizer has been done, and that at least the following have been considered:
• type of organic fertilizer
• method of treatment to obtain the organic fertilizer
• microbial contamination (plant and human pathogens)
• weed/seed content
• heavy metal content
• timing of application, and placement of organic fertilizer (e.g. direct contact to edible part of crop, ground between crops, etc.).
This also applies to substrates from biogas plants.
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