Poplar vs Sal
Both are Tree. Each axis is a percentile across all 538 crops — 80 means higher than four-fifths of the table. Where an axis is missing, the crop genuinely is not measured that way.
Poplar
Sal
| Measure | Poplar | Sal |
|---|---|---|
| Season | Perennial | Perennial |
| Sowing window | Jan–Feb | Jun–Jul |
| Days to harvest | 5–8 yr | 60–120 yr |
| Spacing | 5 × 4 m | 3 × 3 m |
| Soil pH | 6.0–8.0 | 5.5–7.0 |
| Water | 900–1500 | 1000–2000 |
| Temperature °C | 10–35 | 20–38 |
| Seed rate | Entire plants | Nursery |
| Yield | 20–30 m³/yr | 3–5 m³/yr |
| Watch for | Defoliator, stem borer | Sal borer, heart rot |