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Ta fosforet tilbake

Løes, Anne-Kristin and Eikås, Sondre (2019) Ta fosforet tilbake. [Take back the phosphorus.] Nationen (daily newspaper), 24 September 2019, p. 18.

[thumbnail of Nationen kronikk 2019 Ta_fosforet_tilbake.pdf] PDF - Published Version - Norwegian/Norsk


Organic farming systems with restricted access to animal manure often experience decline in soil P concentrations. Nutrients should be cycled in society to maintain the long-term fertility of agricultural soil. One option for this may be precipitation of struvite (magnesium-ammonium phosphate) from sewage treatment plants, to be Applied as fertiliser. Struvite produced in a Norwegian sewage plant (Hias IKS)significantly increased yield levels and soil P concentrations, when applied in one season (2018) in a long-term experiment comparing two levels of manure application at Tingvoll research farm, NW Norway. Struvite has been proposed by the Expert Group EGTOP to be included in Annex 1, listing permitted fertiliser inputs in organic farming. However, a general allowance for struvite on the European level is by November 2019 still pending, hence hampering also an EU-allowance in organic farming. Several countries, e.g. Norway, allow for use of struvite in agriculture in general.

EPrint Type:Newspaper or magazine article
Keywords:phospohorus, soil P, soil fertility, struvite, sewage, recycled fertilisers, SoilEffects
Subjects: Soil > Nutrient turnover
Farming Systems > Farm nutrient management
Research affiliation: Norway > NORSØK - Norwegian Centre for Organic Agriculture
Related Links:https://orgprints.org/36472/, https://www.norsok.no/en/projects/2015/effects-of-anaerobically-digested-manure-on-soil-fertility-the-field-experiment-soileffects
Deposited By: Løes, Anne-Kristin
ID Code:36768
Deposited On:08 Nov 2019 07:07
Last Modified:08 Nov 2019 07:07
Document Language:Norwegian/Norsk
Refereed:Not peer-reviewed

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