Its depth should be six to eight inches below the local frost line.
Many others burrow deep into the soil or head for the bottom of a lake, below the frost line.
Basically they can live at the temperature of the ground below the frost line.
The distance from the die is called the height of the frost line.
They overwinter below the frost line and return to the surface in the spring.
Kepler-9b and 9c are thought to have formed beyond the "frost line".
Also, avoid packages that are above the frost line in the store's freezer.
The simple rock foundation does not even go below the frost line; yet the building remains structurally sound after more than 175 years.
Jemmy was at the frost line when lights came on above him.
Stay with the frost line and you won't be seen.
Its depth should be six to eight inches below the local frost line.
Many others burrow deep into the soil or head for the bottom of a lake, below the frost line.
Basically they can live at the temperature of the ground below the frost line.
The distance from the die is called the height of the frost line.
They overwinter below the frost line and return to the surface in the spring.
Kepler-9b and 9c are thought to have formed beyond the "frost line".
Also, avoid packages that are above the frost line in the store's freezer.
The simple rock foundation does not even go below the frost line; yet the building remains structurally sound after more than 175 years.
Jemmy was at the frost line when lights came on above him.
Stay with the frost line and you won't be seen.
Wörterbuch für Astronomie