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Soybean Planting Depth is Critical
In most cases, soybeans should be planted at a depth of 1 to 11/2 inches and never deeper than 2 inches. The ability of the germinating soybean seedling to push through a crusted soil decreases with deeper planting. Some varieties are especially sensitive to deep planting. In addition, the cooler soil temperatures at greater depths cause slower growth and decreased nutrient availability.
| How Two Varieties Differ in Emergence | |||
| Percent Emergence at three planting depths | |||
| Variety | 2 inches | 3 inches | 4 inches |
| Amsoy | 91 | 68 | 6 |
| Clark | 79 | 8 | 0 |
Source: Iowa State University
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