Critical nutrient concentrations of arable crops

This report discusses the concept “critical nutrient concentrations” inplant tissues and the usefulnessfor diagnosing nutrient deficiency in crops and/or adjusting fertilisation.In chapter 2, the report gives an overview of factors that influence (critical) nutrient concentrationsin plant tissue.Furthermore,chapter 3 describes the methods used for deriving critical nutrient concentrations and chapter 4gives an overview of published K, Mg, Ca, S, B and Mn concentrations in selectedplant organs of potato, onion, sugar beet, wheat, barley, oats, and rye.