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Post by mrfatso on Feb 14, 2016 9:09:50 GMT
I actually started reading the book yesterday, and on page 12 was the answer to my question, although it is not mentioned in the film the Aries crew brought along samples of unsterilised a Earth soil to run tests on plant growth in Martain soil and various mixtures of Earth and Martian Soil. It was these samples that provided the source to 'seed' his potato farm with the bacteria it needed for the plants to grow.
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