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Guidelines for Approximate Safe Rates of Urea (46-0-0)
| Table 1. Guidelines for Approximate Safe Rates of Urea (46-0-0) Nitrogen Applications with the Seed of Canola and Flax (All Rates are Lbs Actual N Per Acre) | |||||||||
| (1" spread) Disc or knife opener | (2" spread) Spoon or hoe opener | (3" spread) Sweep Opener | |||||||
| Soil Texture | Row Spacing | Row Spacing | Row Spacing | ||||||
| % SBU* | 6" | 9" | 12" | 6" | 9" | 12" | 6" | 9" | 12" |
| 17 | 11 | 8 | 33 | 22 | 17 | 50 | 33 | 25 | |
| Light (sandy loam) | 10 | 5 | 0 | 20 | 15 | 10 | 30 | 20 | 15 |
| Medium (loam-clay loam) | 15 | 10 | 5 | 30 | 20 | 15 | 40 | 30 | 20 |
| Heavy (clay-heavy clay) | 20 | 15 | 10 | 40 | 30 | 20 | 50 | 40 | 30 |
Source: Saskatchewan Advisory Fertilizer Council
* % SBU = % seed bed utilization
For example, for a 1-inch spread pattern on a 6-inch row spacing, % SBU = 1/6 x 100 =
17%
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