Citric acid extraction—An underestimated method in forest nutrition?

Julian Fäth, Karl Mellert, Uwe Blum, Axel Göttlein

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


Since recent studies reveal citric acid to be favorable for estimating plant-available P in soils, we investigated if it can also be used for assessing other nutrients. According to our results, it provides stronger correlations with the tree nutrition for Mg (beech, spruce), Ca+K (beech) and Fe (spruce) than the standard methods for determining exchangeable cations. Thus, when estimating plant-available P by citric acid-extraction, these cations should be additionally measured in ICP analysis.

Original languageEnglish
Pages (from-to)691-693
Number of pages3
JournalJournal of Plant Nutrition and Soil Science
Issue number5
StatePublished - 1 Oct 2019


  • European beech
  • Norway spruce
  • exchangable cations
  • plant-available nutrients


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