Originally Posted by nmez21
Just a heads up that oftentimes P levels decrease significantly as you go deeper into the soil. See the attached graphic taken from a Wisconsin putting green. Courtesy Dr. Soldat UW-M. Most important thing is consistency of depth from sample to sample though and year to year to ensure results that are worth interpreting.
Was the lawn tested because it had a visual problem?
To me that may indicate that the applications put on top of the surface are still sitting there as P doesn't really move through the soil profile...
Is this interpretation of the raw data trying to say that P is typically
more prevalent at the surface and declines a bit every inch down???