Dr. Sissel Hansen
Norwegian Centre for Organic Agriculture
Gunnars veg 6
6630 Tingvoll
Tel. +47 404 81 549


Prof. Dr. Christine Watson

Extern resurs, Agricultural cropping systems
Swedish University of Agricultural Sciences
Inst för växtproduktionsekologi, Box 7043
75007 Uppsala

Tel. +46-18-67 10 00

Fax +46-18-67 20 00
Personal webpage

WP 5: N losses, C gains, and greenhouse gas emissions

Soil fertility management measures vary in their impacts on C- and N-dynamics. The increased concentration of easily degradable C- and N-sources in the top soil layer as a result of fertility building measures and after farm operations (e.g. ley destruction, fallow management) and weather events next to situations of limited crop growth due to nutrient deficiencies and pests and disease is expected to enhance the risk for N2O-emissions and NO3-leaching from top soil. This risk can possibly be reduced by an improved management of nitrogen in grass-clover and leguminous cover crops, a balanced fertiliser input, controlled pH, excluding bare fallow, controlled traffic as well as improved soil structure and improved crop rotations.

The objectives of work package 5 are

  • To review and systematize knowledge on C- and N-dynamics as influenced by fertility management.
  • To quantify changes in N-fluxes and C-stocks.


      • Work package coordinator: Dr. Sissel Hansen, Norwegian Centre for Organic Agriculture NORSOEK,  Norway
      • Co-coordinator: Prof. Dr. Christine Watson, Swedish University of Agricultural Sciences, Sweden


      • Task 5.1: Review and systematise knowledge on the effect of fertility building measures on the C- and N-dynamics.
      • Task 5.2: Identify main course of N2O emissions from stockless organic crop rotations.

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