Annex 4 – Case studies
105
p.1. The examples given in Chapter 5 of the 1976 Framework are still valid as well for
surveys of this kind.
Evaluations that combine physical criteria with economic
analysis have been carried
out particularly with respect to surveys for irrigation projects. The Guidelines on land
evaluation for irrigated agriculture (FAO 1985) outline the method for linking results
of physical land suitability (Chapter 6) with economic analysis (Chapter 7).
The following examples include studies that superimpose economic analysis on
natural
resource survey; those that combine resource survey with participatory
methods; and studies combining all three of these techniques in the fully integrated
approach set out in the present volume.
FIGURE A4-4
Overlay and intersection of local and scientific soil maps of a village in northwestern Syria
Scientific soil map according to the World Reference
Base classification
system
Local soil map according to the local classification system
Intersection of the local and scientific soil maps, creating new soil
mapping units containing attributes
from both original maps
