Organic Sulfate of Potash
Organic SOP Fertiliser. Potash fertiliser can be made in two different ways: One method allows SOP to be an allowable input for organic farming operations. This is where natural K containing minerals (such as Kainite and Schoenite) are mined and carefully rinsed with water and salt solutions to remove by-products and produce SOP. This is
 
			
					 
			 
			 
			 
			 
			 
			 
			 
			 
			 
			