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?
What depth was sample taken?
Does the lab know what depth the sample was taken?
Needs ca, p2o5, sop
Quanities ? need more info