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Coldwater, Michigan | You have most of the story on ortho/poly. While poly is more expensive to produce, they are made from much less pure acids, thus the overall cost of poly's tend to be less. Because the poly's are in effect "thicker" (less viscous) they tend to hold micros and other polutants in suspension better than do the ortho's.
Poly does convert back to ortho when it hits soil moisture, at a certain soil temperature, and Ph. Otherwise moisture level, temperature, and soil Ph drive the speed of that conversion. It is the conversion to ortho that determines the plants ability to take it in. Much of the applied poly is tied up in soil solution without ever being converted to ortho. Ortho isn't the only form of "P" that gets tied up.
Poly's are an excellent material to carry your micronutrients. That is the reason most of the LFB Solutions products carry a bit of Poly. It carries the micros better.
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whats the difference Ortho / Poly
