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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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| BAU-01 | Potassium's role in crop resistance to drought and low temperature | |
| CAAS-06 | Status of soil potassium and other nutrients and balanced fertilization effects in selected soils from northern China | |
| CAAS-07 | The relationship of potassium and nitrogen/potassium interactions on yield and quality of crops | |
| CAAS-08 | Status of soil potassium and other nutrients and balanced fertilization in selected soils from northern China | |
| HEBEI-03 | Study on the effects of potassium application to crops | |
| HEBEI-04 | Study on the potassium balance on main soils and the effect of potash application on crop yield | |
| HEBEI-05 | Studies on the effects of potassium application on the main crops and related fertilization techniques | |
| HEBEI-NMS01 | Effects of potassium application and related fertilization techniques in Hebei | |
| SHANDONG-04 | Soil potassium status and crop responses to potash | |
| SHANDONG-05 | Potassium status in major soils and response of cash crops to potash fertilizer in Shandong province | |
| SHANDONG-06 | Fixed-site experiment of potassium balance in a soil-crop system in Shandong province | |
| SHANDONG-NMBF | Nutrient management and balanced fertilization on selected crops in Shandong province | |
