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as well as studies of the morphometrical, physical and chemical character 
istics of different soil consolidation. Various analysis have been carried 
out with the objective to classify soils according to fertility, water 
content, susceptibility to erosion and adaptibility to the implementation 
of agricultural uses. This will make possible a classification of agricult 
ural capability. 
Natural Vegetation 
Through phytogeographical mapping, floristic areas are defined 
within various ecological regions. These regions serve as a base for studies 
in the fundamental disciplines of geomorphology, lithology and climatology. 
An important objective for understanding is an adequate level for conducting 
regional plant inventories in areas of economic value. This will also 
provide information over the occurrence and distribution of species of 
floristic potential. 
Potential Land Use 
Those factors taken into account for the determination of 
potential land use include; 
1) relief, hydrologic, floristic and mineral resources, climate and 
access roads; and 
2) a determined "Mean Natural Carrying Capacity" which will indicate 
those options which best serve the rational occupation and 
integration of the developing region. " 
Figure 3 indicates those areas corresponding to already published reports 
and thematic maps. 
By the end of 1978, yet uncompleted work on the greater part of 
the Amazon region (roughly north of parallel 10°S and west of meridian 45%H) 
will be published. Field studies over this region have already been realized. 
This work consisted of field sampling along the few roads existing in the 
region, along rivers and through the clearing of openings in the dense