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Little River, TX | You can look at
http://www.grdc.com.au/growers/res_upd/south/s03/fluid_fertilisers2.htm
go down to paragraph 4, potassium.
potassium thiosulfate (25% K2O, 17%S) has been introduced as a relatively low salt index form of K and S suitable for foliar applications and as a component of starters. Potassium nitrate (KNO3) solutions are also produced locally for foliar or fertigation treatments but are not shipped long distances because of their low analysis.
Also wander around http://fluidfertilizer.com/ for more information.
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liquid potassium
