However, primary causations consist in that different physiognomy types lack index system of farmland appraisal, and that any land appraisal must choose index system before it values.

 
  • 然而,究其原因,主要在于不同地貌类型区农用地质量等级评价指标体系的缺乏,而任何土地分等定级工作都是在选定指标体系的前提下开展的。
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