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Ultramafic soils have naturally high concentrations of metals and are often low in major plant nutrients. Plant species of non-ultramafic origin, such as Dryobalanops lanceolata (Dipterocarpaceae), generally grow less well on these soils. I found minimal changes in growth, but a 17% reduction in foliar potassium, when seedlings of D. lanceolata were grown in a non-native ultramafic soil when compared...
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