Where an acronym is used for an organisation then this will appear in the Organisations section.

  SGN : Size Grade Number.

  SL : Soluble concentrate.

  SLA : Service Level Agreement.

  SLAN : Sufficient Level of Available Nutrient.

  SMART : Specific Measurable Achievable Realistic Timely

  SMD : Soil Moisture Deficit.

  SMN : Soil Mineral Nitrogen.

  SMV [1] : Slow Moving Vehicle.

  SMV [2] : Standard Minute Value.

  SOLA : Specific Off-Label Approval.

  SOM : Soil Organic Matter.

  SOP [1] : Sulphate of Potash (Potassium Sulphate).

  SOP [2] : Standard Operating Procedure.

  SP : Soluble Powder, in water.

  SPPP : Synthetic Plant Protection Product.

  SRN : Slow Release Nitrogen.

  SSC : Sector Skills Council. The SSCs are also represented by the Skills Federation. Link to web site

  SSMG : Smooth Stalked Meadow Grass.

  STEL : Short-Term Exposure Limit.

  STEPPA : Subject, Scaling, Target identification, Emotion, Perception, Plan and pace, Adapt or act.