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Some carbon
absorbed by plants is deposited in the
soil. Large quantities have been trapped over millennia.
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No-till farming
practices are cited as one means of keeping carbon captured by plants
sequestered in the soil to form a carbon sink. Animal wastes can also
contribute.
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So far this
carbon sink technology is fraught with uncertainty. How much plant material left on the land is incorporated
in soil? How long will it stay there? Will the carbon content of soil reach
equilibrium and absorb no more?
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