commodity markets, however, show that most NAE farmers    have not only become separated from consumers, but food supply chains are    dominated by processors and retailers (Fearne, 1994; Lyson and Raymer, 2000;    PCFFF, 2002; Vorley, 2003). Vertical integration of successive stages in agricultural    and food supply chains under the control of single corporate organizations    or clusters of corporations can reduce the competitive power of farmers    (Lamont, 1992; OFT, 2006; UNCTAD, 2006) who have become disadvan-taged,    inadequately rewarded "price takers" facing limited market    opportunities for their produce. The gap between farm and retail prices is    growing and is wider in countries where transnational corporations (TNC) have    concentrated market power. The farm retail price gap is costing commodity-exporting    countries more than US$100 billion each year and anticompetitive behavior by    agrifood TNCs is said to be a key cause (Morisset, 1997).  
           There is thus    an urgent need to develop policy instruments to remove incentives for farm    concentration and agribusiness concentration (Action Aid International, 2006;    SOMO 2006; UK Food Group, 2005). These include:  
      •     Improve    competition policies within agrifood markets, for instance, by monitoring    corporate concentration, mergers and strategic business alliances and their    anticompetitive effects across national borders;  
      •     Apply    stringent anti-trust measures that dissuade global price-fixing cartels;  
      •     develop    strict monitoring and external verification systems to assess and increase    the credibility and transparency of corporate social responsibility;  
      •     Develop  international  organizations to  monitor the concentration and behavior of    TNCs involved in agricultural trading and food retailing at a global level.    These organizations could be given the task of collecting information,    researching policy advice and developing standards of corporate behavior.  
        Another area of equal importance is that of improving the    "connectivity" between food producers and consumers and increasing    the competitive power of farmers. Some of the measures that could facilitate    this are to:  
          •     Improve    the  market  orientation     and  responsiveness among    producers through training and technical assistance in marketing and related    business management skills;  
          •     Improve    market intelligence and transparency throughout the supply chain;  
          •     Extend    existing and develop new supply chains within NAE and externally that    distribute profits more equitably among actors through negotiated    multistakeholder arrangements;  
          •     Support    actions to add value on or near the farm, through on-farm processing and/or    product differentiation, including for example organic and fair trade products    and products distinguished by geographical origin or appellations;  
          •     Develop    collective business and marketing capability among farmers, through for    example farmer groups, cooperatives and trade association in order to improve    their bargaining position;  
          •     Increase    investments in market development and in   | 
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    marketing infrastructure for local and regional marketing    such as storage, processing, refrigeration and transport.  
        6.2.6 Promoting environmental    sustainability through ecological management  
          From an environmental perspective, the sustainability concept    calls for an ecological and evolutionary approach. The understanding of    specific ecosystems and the ecological principles by which they function are    key elements for the design and management of agricultural systems—simultaneously    ensuring both productivity and natural resource preservation (Altieri, 1995;    Vandermeer, 1995; Gliessman, 1997).  
               The design of    such agroecosystems is based on ecological principles (Reijntjes et al.,    1992) that may be applied using a range of techniques and strategies    (Altieri, 2005): "(1) enhancing recycling of biomass, optimizing    nutrient availability and balancing nutrient flow, (2) securing favorable    soil conditions for plant growth, particularly by managing organic matter and    enhancing soil biotic activity, (3) minimizing losses due to flows of solar    radiation, air and water by way of microclimate management, water harvesting    and soil management through increased soil cover, (4) increasing species and    genetic diversification of the agroecosystem in time and space and (5)    enhancing beneficial biological interactions and synergisms among    agrobiodiversity components thus resulting in the promotion of key ecological    processes and services."  
               AKST needs to    fully take into account this ecological perspective on agriculture and its    dynamic evolution over time and space. In this context, biodiversity—viewed    as the multitude of interactions among all living organisms in the soil and    water as well as on the ground and in the air—plays a central role in the    preservation and the enhancement of the multiple functions of the    agroecosystem (Griffon and Weber, 1996; Altieri and Nicholls, 1999; Thies    and Tscharntke, 1999) and particularly with respect to productivity (Hector    etal., 1999).  
      6.2.6.1  Potential    contribution of AKST for long term soil preservation  
        In the last few decades there has been an intensification    of human activities on soil (industry, agriculture, urbanization, cemeteries,    recreation, etc.). This has largely been achieved without considering soil    diversity and its suitability to accommodate these different activities.    Consequently there has been a pronounced degradation of soil with negative    consequences for a range of soil functions, including the regulation of    hydrological and atmospheric gas processes and the provision of habitats for    flora and fauna.  
             In view of an    ecological management of agroecosystems, there are some areas where AKST can    be developed and help remedy the current situation of soils as mentioned    below:  
             Understand    soils better: including past, present and current dynamics.  
        •     Soil is a    continuous milieu wherein there are vertical as well as lateral organizations    and dynamics. We are in a better position today to understand the vertical    organization but more research is essential to understand the lateral    organization and dynamics of pedological cov-   |