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Workshop November 11–12, 2002
One of the scientific theories within the field of limnology states that water quality mirrors the soil status in the drainage basin, if the water is not affected by direct discharge of any substance. According to this soil and surface water linkage theory, generally accepted by the scientific society, soils acidified by acid precipitation would cause more acidic surface waters. The reverse would be true if acid deposition decreases and the surface waters exhibit recovery.
Since the middle of the 1980’s, the deposition of acidifying compounds has decreased substantially and it is today at the same level as in the early 1950’s in Central Sweden. The decreased deposition of sulphur can be observed in many streams and lakes in the forested landscape, demonstrated by reduced sulfate concentrations, increased buffer capacity (ANC and alkalinity) and increased pH (SEPA 2000). In Norway, reduced oncentrations of inorganic aluminium are documented as well (Skjelkvåle et al. 1996). Unfortunately, long-term time series on inorganic aluminium are not available from Sweden.
According to the theory, the acid status of the soils should also have improved parallel to the surface water recovery. However, recently published (SEPA 2000) soil data and model simulations indicated a continuous soil acidification during the 1990’s down to the B-horizon (increased exchangeable Al) and that the acid soil status should not be expected to improve (base saturation and ANC) during the forthcoming decades in the most acid sensitive areas of Southwest Sweden, respectively. In the perspective of one decade, the results from the soil and surface water assessments were obviously in conflict with the theory of surface waters acting as a mirror of the soil status. Questions arose whether the theory is too simple, if our conclusions have been based on different definitions of acidification/recovery of soil and water or if data and/or mathematical models are non-representative and not comparable with each other.
This scientific workshop was initiated in order to answer those questions and to define important issues for future research related to acidity transfer from soils into surface waters in forested, Swedish catchments dominated by podzolic soils.
Denna bok ingår i ett bokverk om två volymer som behandlar den gröna näringens utveckling, medaljer, belöningar under drygt 200 år. Denna volym handlar om historia och utveckling.
Diffust läckage från åkermark står för en stor del av tillförseln av både kväve och fosfor till vattenmiljön. Arbetet med vattenvård i de nya miljömålen samt i ramdirektivet för vatten kommer att ge ytterligare ökat fokus på denna källa och tillförselväg. Syftet med konferensen var att sammanfatta och sprida den senaste kunskapen om vattenvård i lantbruket.
Denna rapport utgör en översikt och sammanfattning av de regionala livsmedelsstrategier som finns runt om i Sverige. Rapporten är skriven med utgångspunkt i att Sveriges regering har efterfrågat en nationell livsmedelsstrategi och en, i samband med detta, startad konkurrenskraftsutredning.
Socker är föremål för debatt inom flera olika läger. Inom folkhälsan vill man skylla en del av överviktsproblematiken på en oönskat hög sockerkonsumtion. Inom andra kretsar vill man se en ökad global frihandel med socker, vilket skulle gagna många producenter i tredje världen och leda till sjunkande priser men sannolikt då också till en ökad sockerkonsumtion. Dessa och många fler aspekter av produktion, handel och konsumtion av socker diskuterades vid KSLAs konferens den 30 mars 2006
