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Volanic soil can be poor in nitrogen and if there are no native nitrogen fixers, and or top soil erosion, then it will be hard for anything to grow. That is wh
by MrDresden 3y ago
Volanic soil can be poor in nitrogen and if there are no native nitrogen fixers, and or top soil erosion, then it will be hard for anything to grow.
That is why the alaskan lupin was introduced to Iceland, as it can grow in nitrogen poor volcanic soil to halt the erosion and do nitrogen fixation.