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 | Africa |
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| Australia |
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| Bangladesh, China, India, Indonesia, Myanmar, Philippines, Thailand, Vietnam |
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| Brazil |
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| Chile |
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| Colombia |
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| Ecuador |
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| El Salvador |
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| Ghana, Indonesia, Malaysia |
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| Guatemala |
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| India |
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| Indonesia, Malaysia |
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| Malaysia |
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| Mexico |
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 | New Zealand |
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| NEW ZEALAND-01 | Soil potassium in north island hill country | |
| NEW ZEALAND-02 | Potassium fertilization for north Canterbury dairy production | |
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