Posted 3/11/2019 16:43 (#7373993 - in reply to #7369342) Subject: RE: More Kinsey/Albrecht discussion optimum P levels
Soil test levels of phosphorus and potassium are normally reported as elemental P and K. In contrast, recommendations are normally given as P2O5 and K2O.
A target level of 100 pm P for grain crops seems like an error.
I recommend that you speak with an agronomist at the lab and ask for clarification.