China must protect high-quality arable land

@article{Kong2014ChinaMP,
  title={China must protect high-quality arable land},
  author={Xiangbin Kong},
  journal={Nature},
  year={2014},
  volume={506},
  pages={7-7}
}
Figures from a national survey of land use seem positive, but the effort exposed some worrying trends, says Xiangbin Kong. 
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