Does the size of a soybean seed change how fast it sprouts? Seeds from the same plant can vary in mass. This project tests whether heavier or lighter seeds emerge better from the soil. You select soybean seeds at five different masses, from 70 to 220 milligrams. All seeds share the same genetics and moisture level. You run a standard germination test under ideal conditions. Then you run a hypocotyl elongation test at a planting depth of 10 centimeters to measure emergence strength. The mid-range seeds (150 milligrams) performed best overall. The smallest seeds sprouted fastest in the germination test. Differences between groups were small but measurable.