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.
Bender S.F., Schulz S., Martínez-Cuesta R., Laughlin R.J., Kublik S., Pfeiffer-Zakharova K., Vestergaard G., Hartman K., Parladé E., Römbke J., Watson C.J., Schloter M., van der Heijden M.G.A.
Gilgen A., Felder R., Baumgartner S., Herzog F., Jeanneret P., Séchaud R., Paunovic S., Merbold L.