↑[Arnold Finck, Kiel 1976: Pflanzenernährung in Stichworten, S.80, ISBN3-554-80197-6
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{{Information |Description={{en|1=Nutrient availability in relation to soil pH}} {{de|1=Verfügbarkeit verschiedener Nährsalze in Abhängigkeit vom pH-Wert des Bodens}} |Source={{own}} |Author=
FMoeckel |Date=2010-01-10 |Permission= |oth
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