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 | wheat |
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  | Bulgaria |
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 | IPNI-14 | Best Management Practices for Sustainable Crop Nutrition in Bulgaria |  |
  | East Zone India |
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  | IPNI |
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  | North and West Zone India |
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  | Northeast China |
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  | Northwest China |
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   | Southern and Eastern Russia |
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  | Southern India & Sri Lanka |
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  | Western U.S. |
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 | (Not Categorized) |
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