Potassium nitrate should not be entered with fertiliser weight/unit "P2O5"

Potassium nitrate should not be entered with fertiliser weight/unit "P2O5"

P2O5 is not present in potassium nitrate and should have a value of 0, but had a value and therefore may give minor incorrect application rates if the applied amount is indicated in unit "P2O5". To avoid incorrect application rates do not use as weight/unit "P2O5" but rather "product".

This is fixed as part of migration to CFP.