For the first time a comprehensive inventory of wastes that could be recycled in the Swiss agriculture as fertilizer was established. It includes about 60 different types of wastes, which amount to a total quantity of 4.7 million tons of dry matter, of which 0.7 tons are at present used in crop production. They thus cover 8 % of the nitrogen, 15 % of the phosphorus and 3 % of the potassium requirement of the agricultural crop production. In comparison with manure and mineral fertilizers, the heavy metal load of waste fertilizers (relatively to the load of N+P+K) is high. Therefore a guideline for the quality control and registration of waste fertilizers will be introcuced in Switzerland to minimize the environmental risk in connection with the use of waste fertilizers.
A comparison of different methods of winter-wheat fertilisation with nitrogen showed that nitrogen surpluses can be significantly reduced by means of site-specific variable-rate nitrogen fertilisation.
Fabian Y., Roberti G., Jacot K., Gramlich A., Benz R., Szerencsits E., Churko G., Prasuhn V., Leifeld J., Zorn A., Walter T. (ꝉ), Herzog F.
Many tile drainage systems on arable land are in need of renewal. Cantons and stakeholders will now be given a decision-making tool enabling them to assess such areas in detail and to find sustainable solutions.
Ammonia emissions from the Swiss farming sector have scarcely declined over the past 20 years. This is because the factors leading to either an increase or decrease in emissions have for the most part cancelled each other out between 2000 and 2020.