SOP isn't a Obviously occurring mineral, and frequently has to be produced by means of chemical methods. As a result of useful resource-intense procedures applied to produce it, SOP is priced higher than MOP. The most typical process utilised to produce the fertilizer SOP is called the Mannheim process. In https://manuelskbtk.blogmazing.com/26510201/the-smart-trick-of-tsp-fertilizer-for-sale-in-thailand-that-no-one-is-discussing