```json
{
	"low": [3.0, 3.5, 4.0, 4.5, 5.0],
	"high": [6.0, 6.5, 7.0, 7.5, 8.0]
}
```
Based on prior knowledge and common observations, a low grain yield for this soybean cultivar would typically correspond to a smaller number of grains per pod. In this case, some typical values for NS for the low target class might range from 3.0 to 5.0.

On the other hand, a high grain yield would usually be associated with a larger number of grains per pod. Hence, typical values of NS for the high target class may range from 6.0 to 8.0.