Based on my prior knowledge, the Thousand Seed Weight (MHG) feature can provide insights into the grain yield of a soybean cultivar. Generally, higher values of MHG indicate a higher grain yield, while lower values suggest a lower yield. To determine the appropriate ranges of values, it would be helpful to consult existing literature or domain experts.

Based on my analysis, I will provide possible values of the MHG feature for each target class:

```json
{
	"low": [150.0, 155.5, 160.2, 165.0, 170.1],
	"high": [200.6, 205.7, 210.3, 215.0, 220.2]
}
```

Please note that these values are just examples and should be adjusted based on actual data and expert knowledge in the field.