Nitrogen
Table XX. Cucurbit Crop (Fertigated) Nitrogen and Potash Injection Schedules |
|
| Stage | Rate per week |
| Transplanting to fruit set | 5 kg/ha |
| Fruit sizing to harvest | 10 kg/ha |
| During harvest | 5 kg/ha |
Cucurbit Crop (Non-Fertigated)
Apply up to 110 kg N/ha. Broadcast 65 kg N/ha and all the phosphate and potash required prior to planting. Side-dress the remainder of the nitrogen before the vines start to run. On sandy soils, a second application may be necessary after the vines begin to run.
Phosphorus and Potassium
Test the soil to determine phosphorus and potassium requirements.
Table X, Phosphorus and Potassium Requirements for Cucurbit[1] Crops 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 | 230 | 0-15 | HR | 230 |
| 4-5 | HR | 230 | 16-30 | HR | 220 |
| 6-7 | HR | 220 | 31-45 | HR | 200 |
| 8-9 | HR | 220 | 46-60 | HR | 180 |
| 10-12 | HR | 210 | 61-80 | HR | 140 |
| 13-15 | HR | 190 | 81-100 | HR | 100 |
| 16-20 | HR | 170 | 101-120 | MR | 70 |
| 21-25 | MR | 140 | 121-150 | MR | 50 |
| 26-30 | MR | 110 | 151-180 | MR | 40 |
| 31-40 | MR | 80 | 181-210 | LR | 0 |
| 41-50 | MR | 50 | 211-250 | RR | 0 |
| 51-60 | LR | 30 | >250 | NR | 0 |
| 61-80 | RR | 0 | |||
| 80+ | NR | 0 | |||
[1] Cucumbers, Muskmelons, Pumpkins, Squash and Watermelon