Going underground

After centuries of agriculture, scientists are finally admitting that they are in the dark about the role of earth worms. Today’s Guardian carries a piece in which earth worms are estimated to add 140 million tonnes of wheat to the world’s wheat harvest, without a fully-argued reasoning of how they might do this.

There is more than “nice to know” involved. Crop scientists have been happy to spray crops without a full understanding of what makes them grow well. Shouldn’t we change this?

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