Spiess E. Nitrogen, phosphorus and potassium balances and cycles of Swiss agriculture from 1975 to 2008. Nutrient Cycling in Agroecosystems, 91, (3), 2011, 351-365. ISSN Print: 1385-1314 Digital Object Identifier (DOI): https://doi.org/10.1007/s10705-011-9466-9 Signatur: ART 2011-454 Publikations-ID (Webcode): 28224 Link kopieren Per E-Mail versenden