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 \ \\/ //   / _ \\   |  _ \\  | || | ||   ____    
  \   //   | / \ ||  | |_| || | || | ||  |    \\  
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 `-`  --`   `---`    `-` --`    `---`    |_|`-`   
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Text this: Soil fertility affected by land use history, relief position, and parent material under a tropical climate in NW-Vietnam