Media type: E-Article Title: Beyond adding up inputs and outputs: process assessment and upscaling in modelling nutrient flows Contributor: Schlecht, Eva; Hiernaux, Pierre Published: Springer Science and Business Media LLC, 2004 Published in: Nutrient Cycling in Agroecosystems, 70 (2004) 3, Seite 303-319 Language: English DOI: 10.1007/s10705-004-0765-2 ISSN: 1385-1314; 1573-0867 Keywords: Soil Science ; Agronomy and Crop Science Origination: Footnote: