and image enhancement. Int. Symp. Rem. Sens, of
Arid and Semi-Arid Lands, Cairo, Egypt.
Hilwig, F.w. 1982. Visual interpretation of multi
temporal Landsat data for inventories of natural
resources. ITC Journal, 297-327.
Mathews, H.L. et al. 1973. Application of multispec-
tral remote sensing to soil survey research in
southeastern Pennsylvania. Soil Sci. Soc. Am.
Proc., 37, 88.
Nieuwenhuis, E. 1978. Some observations on small-
scale soil surveys and remote sensing. ITC Soils
Dept., internal lecture note SOL 26, Enschede.
Samki, J.K. et al. 1982. Fertilizer recommendations
related to ecological zones in Tanzania, Mlingano.
Siegal, B.S. and Goetz, A.F.H. 1977. Effect on vege
tation on rock and soil-type discrimination. Pho-
togramm. Engng. 43, 191.
Thompson, D.R. et al. 1984. Variation in alluvial
-derived soils as measured by Landsat Thematic
Mapper. Soil Sci. Soc. Am. J., 45, 137.
Van Sleen, L.A. 1983. Aerial photography and Land
sat MSS remote sensing in soil survey planning.
ITC Soils Dept., internal lecture note SOL 9, En
schede .
Westin, F.C. and Frazee, C.J. 1976. Landsat data,
its use in a soil survey program. Soil Sci. Soc.
Am. J., 40, 81.