Soil and multiple dimensions of the WEFE nexus
Magic proposes three dimensions to the WEFE nexus biophysical, policy and knowledge framing.
Soil as part of the biosphere
Soil health has impacts on water quality, biodiversity and carbon sequestration processes with implications for SDG 6 (water) 13 (climate) and 15 (biodiversity). Agricultural management can be positive (no tillage, organic mulching, crop rotation) or negative (synthetic mulching, fertilizer use) for soil health. Every centimetre of soil takes a long time to form, making it essential that we protect this fund underpinning our socio ecological system.
Soil as a challenge for policy coherence
The link between some aspects of water, agriculture and environmental policies is quite well understood. For example, soil sediment can affect aquatic ecological status and whether designated sites are classed as being in favourable condition. To reduce erosion (the source of the sediments) relies on farmers following and perhaps even going beyond cross compliance rules under the Common Agricultural Policy. However, explicit links with energy policy while significant, are not yet well articulated, for example EU food production is reliant on artificial inputs of synthetic fertilizers, with high energy requirements. Increased demand for energy from biomass (as part of a decarbonization strategy) may trigger the conversion of marginal land with conservation benefits into production of energy crops. Demand for biomass can lead to the removal of crop residues that otherwise would remain to improve soil organic matter.
Soil as a boundary object for knowledge exchange
Degradation of soil is visible to farmers (unlike diffuse pollution to air or water), illustrated by the knowledge controversies where experts claim water re-use and desalination is good to rebalance natural assets, but farmers dispute this through local knowledge of how their soils are slowly changing. This provides an opportunity to encourage users to better understand, and value, this resource. But at the same time, we need to also consider pressure on soils beyond the EU through the externalization (via imports) of our food production and consumption systems. In this case soil degradation is taking place elsewhere and may be invisible to farmers and consumers in Europe.
Current mismanagement of soil is an example of a serious pressure on the biosphere, with impacts on the viability and desirability of our socio ecological systems Within the EU, there should be more attention to soil within WEFE nexus policy making and delivery of the UN Sustainable Development Goals.
© MAGIC Nexus