Conceptual framework to evaluate organic fertilisers on C and N mineralisation and economic aspects

Summary

Organic matter is widely regarded as an important factor in maintaining and improving soil quality of agricultural land. This report presents a simple methodology to evaluate organic fertiliser products with respect to degradation and carbon storage in soil. Based on incubation trials and laboratory analyses conducted, the concepts were tested and calibrated in terms of their impact on soil quality with respect to net C and N mineralization. The economic aspects were also discussed. The methodology works well for carbon but nitrogen mineralization still requires attention.