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 | nutrient deficiency |
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| nutrient removal |
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| oats |
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| oilseeds |
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| plant analysis |
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 | potassium |
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| Brazil |
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| Eastern Canada & Northeast U.S. |
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| North and West Zone India |
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| NWZ INDIA-07 | Potassium nutrition of temperate fruits | |
| NWZ INDIA-07B | Nitrogen, phosphorus and potassium nutrition of olive | |
| NWZ INDIA-08 | Response of vegetable crops to potassium application | |
| NWZ INDIA-08B | Response of vegetables to potassium application | |
| NWZ INDIA-34 | Developing potassium fertilizer recommendation for pulse crops in Uttar Pradesh | |
| NWZ INDIA-38B | Behavior of potassium in potassium depleted and non-depleted vertisols of Maharashtra | |
| NWZ INDIA-38C | Potassium distribution, fixation and release in salt affected soils of Maharashtra | |
| NWZ INDIA-42 | Crop response to potassium, sulfur and magnesium in gangetic alluvium of Uttar Pradesh | |
| NWZ INDIA-47 | Potassium use in tomato | |
| NWZ INDIA-48 | Potassium deficiency in oil crops and pulses | |
| NWZ INDIA-50 | Multi-nutrient nutrition of spice crops involving phosphorus, potassium, sulfur and magnesium in mountain acid soils of the western Himalayas | |
| Northcentral China |
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