This product will not change the soil pH. This product is water soluble and ground down to 200 mesh powder for use in fertigation and spray application. This source of Potassium, Sulfur & Magnesium, K-Mag is a natural source that is readily available 22% S, 21.5% K & 11% Mg.
Please Note: this product is hydroscopic and will absorb moisture from the air. This can cause it to solidify in storage but will still be soluble. Apply according to soil test result. Broadcast and work in at 20-50 lb/acre, foliar apply 1-2 lb/acre. OMRI Listed Ultra SOP Solution Grade Fine