Nitrogen
After field corn, use 120-150 kg N/ha. Reduce nitrogen application to 100-130 kg/ha when following other crops. Excess nitrogen will not increase sugarbeet yield, but will decrease sugar content and clear juice purity.
Phosphorus and Potassium
Test the soil to determine phosphorus and potassium requirements.
Table X, Phosphorus and Potassium Requirements for Sugarbeets on Mineral Soils |
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| Legend: HR = High Response MR = Medium Response LR = Low Response RR = Rare Response NR = No Response | |||||
| Phosphorus | Potassium | ||||
| Sodium Bicarbonate Phosphorus Soil Test (ppm) | Rating | Phosphate (P205) Required kg/ha | Ammonium Acetate Potassium Soil Test (ppm) | Rating | Potash (K2O) Required (kg/ha) |
| 0-3 | HR | 150 | 0-15 | HR | 180 |
| 4-5 | HR | 140 | 16-30 | HR | 170 |
| 6-7 | HR | 140 | 31-45 | HR | 160 |
| 8-9 | HR | 130 | 46-60 | HR | 140 |
| 10-12 | MR | 130 | 61-80 | HR | 120 |
| 13-15 | MR | 120 | 81-100 | MR | 90 |
| 16-20 | LR | 100 | 101-120 | MR | 70 |
| 21-25 | LR | 90 | 121-150 | MR | 20 |
| 26-30 | RR | 70 | 151-180 | LR | 0 |
| 31-40 | RR | 50 | 181-210 | LR | 0 |
| 41-50 | RR | 30 | 211-250 | RR | 0 |
| 51-60 | RR | 0 | >250 | NR | 0 |
| 61-80 | RR | 0 | |||
| 80+ | NR | 0 | |||
| Excess application of potassium will lead to luxury consumption by the sugarbeet plant. This has a negative effect upon clear juice purity. | |||||