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Potassium sorbate is the potassium salt of sorbic acid, chemical formula CH3CH=CH−CH=CH−CO2K. It is a white salt that is very soluble in water (58.2% at 20 °C). It is primarily used as a food preservative (E number 202).Potassium sorbate is effective in a variety of applications including food, wine, and personal-care products. While sorbic acid occurs naturally in rowan and hippophae berries, virtually all of the world's supply of sorbic acid, from which potassium sorbate is derived, is manufactured synthetically.
The use of potassium fertilizer can significantly increase agricultural productivity. Studies have shown that adequate potassium levels in the soil can lead to higher crop yields, improved fruit quality, and enhanced resistance to pests and diseases. For instance, crops such as maize, wheat, and potatoes show marked improvements in growth and yield when provided with sufficient potassium. This makes potassium fertilizer a valuable tool for farmers aiming to maximize their production while ensuring food security.