WORKING GROUP 3 
SOILS 
INCLUDING LAND C LASS IFI CAT I ON, SOIL CONSERVATION 
page 
P. Buringh The Application of Aerial Photographs for Soil Surveys in 
Development Projects 136 
R. Webster The Use of Basic Physiographic Units in Air Photo Inter 
pretation 143 
T. Nakano Landform Type Analysis on Aerial Photographs - Its 
Principle and its Techniques 149 
L. F. Curtis Soil Classification and Photo Interpretation 153 
P. de la Souchère Essais de Photo-Interprétation en Zone Forestière Ombro- 
N. Leneuf phile du Sud-Ouest de la Côte d’ivoire 159 
J. L. Retzer Soil Surveys in Timbered Mountain Lands of the U.S.A. . 166 
J. J. Reynders The Analysis of Shifting Cultivation Areas 171 
R. A. Jarvis The Use of Photo Interpretation for Detailed Soil Mapping 177 
R. M. S. Perrin The Use of Airphotographs in the Study of Patterned Ground 
in East Anglia 183 
J. Dan The Disintegration of Nari Limecrust in Relation to Relief, 
Soil and Vegetation 189 
K. VAN der Meer The Place of Pedological Research in the Agricultural 
Development Plan 195