14 November 2011 Last updated at 15:28 ET

Japan farm radioactive levels probed

By Jennifer Carpenter Science reporter, BBC News

New research has found that radioactive material in parts of north-eastern Japan exceeds levels considered safe for farming.

The findings provide the first comprehensive estimates of contamination across Japan following the nuclear accident in 2011.

Food production is likely to be affected, the researchers suggest.

The results are reported in the Proceedings of National Academy of Sciences (PNAS) journal.

In the wake of the accident at Japan’s Fukushima nuclear power plant, radioactive isotopes were blown over Japan and its coastal waters.

Fears that agricultural land would be contaminated spurred research into whether Japanese vegetables and meat were safe to eat.

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