In this presentation Professor Christopher Cullis asks how does the Marma Bean acquire sufficient nutrients from the low fertility sandy soil it grows in?

In this video he explaines hus hypothosis that the soil microbiome is important in nutrient acquisition. The microbiome (bacterial and fungal) has been
characterized to identify possible plant growth promoting and nutrient helpers. Marama appears to be able to improve nutrient acquisition of
neighboring plants and the microbiome

components may have use as biofertilizers for other crops.

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