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September 15, 2015

Just Released – “Use of Potassium Sulfate Fertilizer: Principles and Practices” 2015 Edition


The SOP Information Board's latest research for alfalfa and other key K crops

Just released by the Sulfate of Potash Information Board (SOPIB), the Use of Potassium Sulfate Fertilizer: Principles and Practices is 137 pages of the latest agronomic and economic research findings on sulfate of potash (SOP). From practical advice on application methods, to agronomic research details – the SOPIB publication is a comprehensive resource for potassium and sulfur soil/plant nutrition.

The book includes plant-specific information for numerous crops; below highlights a few alfalfa key findings.

  • About 28 kg. of K20 are removed by each ton of harvested alfalfa per hectare, meaning potassium is required to maintain high productivity and stand persistence.
  • The best strategy for keeping K levels in acceptable ranges is to apply top dressing fertilizers when chloride levels are above 0.96 percent.
  • Trials with MOP and SOP fertilizers show alfalfa stands increased forage yields upon continuous SOP treatments, making SOP the clear and consistent winner.

To review these alfalfa research results in their entirety – as well as other crop research –download the Use of Potassium Sulfate Fertilizer: Principles and Practicesclick here.