Over the last 10 years, Teagasc has analysed an average of 38,694 soil samples annually for its farmer clients. Given the geographical spread (all counties) and large numbers of soil-sample data included, the Teagasc soil nutrient data has provided valuable insights into soil fertility trends at a national level. This information has helped to highlight the areas and farm enterprises where action on nutrient management is most required.In this article, we review soil fertility trends for soil pH and the major nutrients – phosphorus (P) and potassium (K) – emerging from these soil sample results.