Global Potassium Sulphate Market to reach US$ 6,598.7 Million by 2027 – Coherent Market Insights SEATTLE, May 21, 2019 (GLOBE NEWSWIRE) -- The global potassium sulphate market was valued at US$ 4,000.2 million in 2018, and is projected to exhibit a CAGR of 5.8% during the forecast period...