Science

'Bomb carbon' in wood shavings helped researchers measure the stability of biochar in soil

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Based on a feed excerpt; full article content has not been acquired. Source evidence retrieved 20/10/2026, 17:25:24 UTC.

Briefings

Researchers from the Swedish University of Agricultural Sciences developed a method to measure biochar stability using wood shavings from 1960s nuclear weapons testing. This approach allows scientists to track how long carbon remains in soil, addressing a critical gap in understanding biochar longevity. The study was published in the journal Radiocarbon.

Key points

• Researchers used wood shavings from 1960s nuclear weapons testing to measure biochar stability in soil.
• The study was published in the journal Radiocarbon.

Context

Biochar is used to store carbon in soil and reduce atmospheric CO2, but its persistence in soil remains poorly understood. This study provides a new method to measure that persistence using historical wood samples.

Limitations

The evidence relies on wood from a specific historical period (1960s) and nuclear testing context. No direct measurements of biochar stability in modern soil are provided, and the study does not quantify the exact duration of carbon storage.

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