This paper describes an innovation trajectory for sustainability in egg production in The Netherlands in the period 2002-2012. In the approach as well as in the analyses, insights from scientific disciplines that have studied transformations towards sustainability were adopted. Central stage is the project ‘Keeping and loving hens’ and its outcome, by a variety of follow up activities, in terms of technical changes as well as rearrangements of key players in the Dutch egg sector.

The ‘Keeping and loving hens’ project was meant to contribute to a change in the Dutch egg sector towards sustainability by explicating and integrating the basic needs of the hen, farmer and citizen in an interactive design process with stakeholder involvement. At the end of the project, various other projects and activities by different key players has taken place, several of which have been evaluated and published. Together they provide a detailed description of a pathway of change. The multiple design goals included income for the farmer, acceptance by the public and improved animal welfare. Analyses has shown that designing well-founded images for laying hen husbandry systems created a learning network for sustainable egg production and elicited entrepreneurial innovations which gained the support of both animal welfare and retail organisations. Furthermore, it prompted government to develop additional policy instruments to support innovation for sustainable development. By early 2012, four laying hen farms in The Netherlands had adopted the principles developed in the project including functional areas for hens, coverable runs, no beak trimming and visitor's facilities to improve local embedment. Their production represented about 0.4% of total egg production in The Netherlands. The most important outcome, however, was a realignment of key players including farmers, retail, animal welfare organizations and government. Together they contribute to a pattern of emerging supply chains characterised by improved animal husbandry at the farm level in combination with an emerging market that is prepared to pay a premium for these products.

The soil erodibility factor (K) of the Revised Universal Soil Loss Equation is currently considered a constant for all soils in the same type, regardless of production practice. To examine the effect of alternative production systems on the K-factor we compared pairs of alternatively and conventionally farmed fields on a Judson silt loam (Fine-silty, mixed, mesic Cumulic Hapludolls), a Yutan silty clay loam (Fine-silty, mixed, mesic Mollic Hapludalf), and a Wann fine sandy loam (Coarse-loamy, mixed, mesic Fluvaquentic Haplustolls). Soil cores were taken from the surface 10 cm and analyzed for organic matter, permeability, structure, and texture. These data were used to estimate K-factors from a nomograph. All soils in the study had a fine granular structure. Organic matter content and permeability were significantly higher for the alternatively managed field at every location, except for no difference in permeability on the Judson soil. However, the K-factor was significantly lower for the alternative system on the Judson soil. Of all the parameters, texture has the greatest influence in determining K-factors within the nomograph, with soils higher in silt being more erodible than soils higher in sand or clay. Thus, the influences of alternative production systems affected the Judson soil to a greater degree than other textures because of its higher inherent susceptibility to erosion. This study shows that alternative production systems affect the K-factor of some soil types and can reduce soil erodibility, and therefore should be considered when developing conservation plans.