Mapping Agricultural Frozen Soil on the Watershed Scale Using Remote Sensing Data

Table 8

Distribution of frozen/unfrozen soils for the12 radar images acquired during the three winter seasons (2003-2004 to 2005-2006) over the Bras d’Henri watershed, by land use.

Winter season	Date (dd/mm/yyyy)	Untilled frozen soils (%)	Tilled frozen soils (%)	Unfrozen soils (%)
First	08/11/2003	31	34	35
	02/12/2003	39	43	18
	19/01/2004	47	49	4
	29/02/2004	43	52	5
Second	02/11/2004	31	38	31
	13/01/2005	39	40	21
Third	08/01/2006	19	21	60
	01/02/2006	10	12	78
	25/02/2006	24	27	49
	21/03/2006	23	29	48
	14/04/2006	10	14	76
	08/05/2006	9	11	80