We calculated balances for cadmium (Cd), copper (Cu), lead (Pb) and zinc (Zn) on basis of field-specific data for agricultural land use for 48 sites of the Swiss Soil Monitoring Network (NABO) for the period 1996 to 2001. The balance approach used considered inputs by animal manure, mineral and waste fertilizer, pesticides and atmospheric deposition as well as outputs by crops. For the majority of the sites we found that the outputs were about in the same order as the inputs resulting in soil accumulation rates of less than 1 % of the guide value within one decade. Increasing soil concentrations larger than 1 % of the guide value within one decade were predicted at seven (Cd), ten (Cu) and twenty (Zn) of the 48 NABO-sites. Furthermore, at some sites we estimated large inputs of Zn by animal manure and of Cu by pesticides and animal manure. The predicted increase for those cases was up to 5 % of the guide value within one decade for Cu and Zn at intensive husbandry farms and up to 21 % for Cu at vineyards. In conclusion, the element balance provides the identification and prediction of temporal changes of pollutants in soil. They complement the repeated soil measurements that are being carried out in the NABO. Only with such repeated soil measurements the element balances can be validated and the real changes in soil concentration determined.
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.