The potato sown area showed a trend of increase first and then decrease, from 14.00 × 10 3 ha in 2001 to 25.72 × 10 3 ha in 2009.
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The potato sown area showed a trend of increase first and then decrease, from 14.00 × 10 3 ha in 2001 to 25.72 × 10 3 ha in 2009.