Fertility Materials

Prohibited materials
      A- The use of sewage sludge or biosolids is prohibited. This includes sludge ash.
B- All forms of synthetic fertilizers, including nitrate and ammonium salts, saltpetre, Chilean nitrate aka nitrate of soda, soluble phosphates, and chloride-containing potassium salts are prohibited.
C- The use of plant wastes such as lawn clippings, leaves, green chop, or compost from municipal sources may be contaminated with lawn chemicals and/or petroleum products and consequently are prohibited for direct mulching, unless it can be clearly demonstrated that they are free of prohibited materials. They may be used as fertility ingredients if they are composted as described above. If there is reason to believe that such materials may be contaminated with prohibited materials Demeter reserves the right to have the materials tested.

Off-farm manure sources should come from certified organic livestock production at a minimum. If this is not possible and conventional livestock manure is used, the materials used in the conventional livestock production (i.e. wormers, hormones, GMO feed, antibiotics) must be documented. No manure that is derived from “intensive” confinement operations -animals not having regular, reliable and effective access to the outdoors- will be allowed.

Imported fertility inputs
If meals from potential GMO crops are to be used as production aids, it  must be verified that the source is non-GMO.
Ash may be used as fertility input, only if obtained from acceptable sources such as untreated wood or coffee hulls. The source should be plant-based and free of prohibited substances. Caution is advised in application rates due to unknown mineral content.
The addition of some minerals, particularly trace minerals, can affect mineral balances in the soil. The importation of any minerals should be based on a documented need.

Note: This is an excerpt of "Biodynamic Farm Standard (2010). Demeter Association Inc."