ardy 
use 
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ince 
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ed over 
Another typical feature of this area is woods, and wheat 
especially is cultivated on small plots in the plain. In this 
area cities are located in the valleys. 
The areas considered are representative of the situation 
found at a regional level (see figure (04)) and at a national 
level also represent well some of the situations found most 
frequently in Northern Italy. Special attention must be paid 
to the survey of physical characteristics in the areas being 
examined and the size of agricultural fields where the particular 
species is grown. 
Figure (05) therefore shows that average size is between 5.5 and 
6.5 hectares.Another aspect of special importance to the 
environment in general and the layout of settlements on the 
territory is the very close network of towns,villages etc. and 
that the network of asphalted and non-made-up roads intersect 
throughout the region, especially in the plain. 
The aim of the survey made on the three areas is to specify 
several land groups for each of the existing agricultural 
species. The following groups of soil use were investigated: 
a) agricultural crops 
al) wheat and small grains 
a2) corn 
a3)rice 
a4)forage crops (meadows,grass fields 
and pastures) 
a5)tree crops (orchards and vineyards) 
b) woods 
'C) non-agricultural surfaces 
d) unproductive surfaces.