TY - JOUR TI - A multi-regional soil phosphorus balance for exploring secondary fertilizer potential: the case of Norway PY - 2015 AU - Ola Stedje, Hanserud AU - Eva, Brod AU - Anne Falk, Ødegaard AU - Daniel B., Müller AU - Helge Brattebø T2 - Nutrient Cycling in Agroecosystems DO - 10.1007/s10705-015-9721-6 ER -