GSR Micronized Soft Rock Phosphate MSR 0-12-0
GSR Micronized Soft Rock Phosphate MSR 0-12-0. Micronized Soft Rock Phosphate, or MSR, is a non-metallic element that originates from the fossilized remains of the ancient organic life found around the world.Usually it is found in a rock form that is applied in large quantities to the soil which takes years to break down to plant available form even in …