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

Table 7

Radar backscattering coefficient thresholds (dB) used to differentiate frozen from unfrozen soils taking soil and land use type into account over the Bras d’Henri watershed.

Soil types (field number)	Field type
	Tilled	Untilled
Mawcook, sandy loam (1, 2)	−10.5	−12.9
Le Bras, loam (3, 4)	−11.8	−13.1
Neubois, loam (5, 6)	−10.8	−13.2
Beaurivage, sandy loam to loamy sand (7, 12, 14)	−9.5	−13.0
Woodbridge, loam (9, 10)	−9.9	−12.8
Organic soils (11)	−9.8	–^(a)

^(a)Because the untilled field is not represented.