Table 3. K requirement for unit of economic yield of different crops.
| Crops | Content a (kg K2O t-1) |
Crops | Content a (kg K2O t-1) |
|---|---|---|---|
| Wheat | Peanut | 43.27 | |
| Winter wheat | 27.14 | Sunflower | 93.22 |
| Spring wheat | 29.02 | Rape | 57.4 |
| Maize | Sesame | 59.8 | |
| Spring maize | 18.44 | Other oil crops | 72.1 |
| Summer maize | 19.16 | Vegetables | 4.85 |
| Rice | Fruit | 6 | |
| Early season rice | 21.01 | Melons | 6.5 |
| Middle-season rice | 22.11 | Flue-cured tobacco | 75.65 |
| Late rice | 19.64 | Tobacco | 26 |
| Single cropping rice | 17.24 | Tea | 24 |
| Barley | 24.07 | Bast fibre plants | 62 |
| Foxtail millet | 20.07 | Cotton | 60.03 |
| Sorghum | 28.97 | Sugar beet | 7.63 |
| Other cereals | 26.8 | Sugarcane | 3.4 |
| Potato | 10.6 | Soybeans | 39.05 |
| Sweet potato | 7.13 | Pea | 28.6 |