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FiBL project

Title QualityLowInputFood WP 3.1: Development of strategies to optimise soil quality characteristics
Official Acronym QLIF, WP 3.1
Official project number 506358
FiBL project number 3500103

An important characteristic of organic and “low input” production systems is the more frequent use of manure and other organic matter based fertilizer inputs (e.g. green manures, composts). This type of inputs and the prohibition (in organic systems) or reduced use (in other “low input” systems) of soil pesticides is thought to result in environmental, biodiversity and/or agronomic benefits (e.g. increases in soil biological activity, earthworm biomass, soil aggregate stability, organic matter content, erosion resistance). In addition, some organic matter based inputs are known to reduce the disease incidence in crop production systems.

Nitrogen release characteristics from organic matter based fertilizer inputs.
The nutrient availability pattern in soils (in particular of N and P) receiving organic matter based fertilizer inputs (OMFIs) is more difficult to predict than the nutrient availability from mineral fertilizer inputs. This is mainly because a large proportion of nitrogen and phosphorus present in OMFIs is in organic form and only becomes available after mineralization by the soil biota. The mineralization potential in soil is known to be influenced by environmental conditions, “inherent” soil biological activity and plants growing in soil. It has also been shown that the “inherent soil biological activity” can be increased by specific long-term soil management practices.

Soil-mediated disease suppressiveness
Although the phenomenon is well described in the literature, there is still insufficient information about the mechanisms and modes of action resulting in (a) inherent soil suppressiveness (resulting from specific long term soil management practices) and (b) short term suppressive effects resulting from specific organic matter based fertilizer inputs (Berner et al, 2002; Bullock & Ristiaino 2002). The lack of understanding of the underlying mechanisms and “modes of action” makes it difficult to increase the efficacy and commercial use of crop protection strategies based on long-term soil management with suppressive organic matter inputs..

The work-package led by FiBL in this project focused on:

  • The effect of organic matter based fertilizer inputs on physical, chemical and biological parameters of soil fertility (WP 3.1.1) (FiBL, Newcastle University, University of Kassel)
  • The effect of soil biological activity on nitrogen mineralization capacity, N-release patterns in soils and potential N-use efficiency (WP 3.1.2) (Newcastle University)
  • The effect of soil biological activity and organic matter based fertilizer inputs on the suppressiveness of soils to soil- and air-borne diseases (WP 3.1.3) (FiBL, University of Kassel)
Project website


Project status completed
Start of project 01.03.2004
End of project 31.05.2009
Financing/ Donor

European Union, 6th Research Framework Programme

FiBL project leader/ contact
  • Tamm Lucius (Department of Crop Sciences, Deputy directors)
FiBL project staff
Role of FiBL

Work package leader

Further Information
Research area
Date modified 14.06.2019
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