The calculations set forth approximations for {TAIL ~ the freezing time} and power demand as a function of the advance of the freezing front for various conditions of soil moisture and {HEAD ~ initial soil temperature} 
The calculations set forth approximations for { TAIL ~ the freezing time } and power demand as a function of the advance of the freezing front for various conditions of soil moisture and { HEAD ~ initial soil temperature }
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD