In addition to nitrogen and potassium, phosphorus is often the limiting factor for plant growth. Current environmental standards restrict the use of sewage sludge and manure in agriculture. As a result, the phosphorus contained cannot be reused, which must therefore be questioned. You can find out more about this in our position paper.

It is advisable to expand the separate collection and composting of household biowaste. By returning composts to agriculture — in accordance with the rules of good professional practice — the nutrient cycle can be supported and soil fertility can be maintained or improved. At the same time, latent over-fertilization in residential areas can be counteracted. For similar reasons, high-quality recycling of livestock fertilisers and even industrial products developed for biological recyclability should be supported. More about this topic Climate and soil protection through composting in Germany.