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 | manganese |
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| maximum economic yield (MEY) |
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| nitrogen |
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| nutrient management |
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| nuts |
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| oil palm |
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| phosphorus |
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| plantation crops |
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| Australia & New Zealand |
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| East Zone India |
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| Eastern Canada & Northeast U.S. |
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| Great Plains U.S. |
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| North and West Zone India |
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| Northcentral China |
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 | Northeast China |
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| HEILONGJIANG-07 | Study of dynamic changes in soil potassium content and its agronomic regulations in Heilongjiang province and the fertilization of some crops | |
| HEILONGJIANG-NMS01 | Soil Nutrient Management Technology and Precision Agriculture in Heilongjiang | |
| JILIN-06 | Cycling of potassium under continuous cropping of maize and its balanced regulation and control | |
| LIAONING-05 | Research on the requirement and use of potassium in Liaoning province | |
| Northeast India & Bangladesh |
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