 Geography:

The territory of San Martín can be divided
into four morphological zones: the western, near to the eastern side of the Andean
Plateau, with a rough topography and many ravines; the zone of the wide valleys, with
stepped terraces formed by the Huallaga River and its affluents, where population is
engaged mainly in cattle and agriculture; the southwest zone, with a relief coming down
from the Cordillera Azul, with low elevation, where is an impressive canyon known as
Cajón de Sión, which finishes in the Cayumba rapids; and a little low jungle zone with
areas easily flooded and with almost no accidents. The climate mainly warm humid, with a
season without rains and nights relatively fresh.
The hydrographical axis of the department is made up by the
mid course of the Huallaga River, which with its affluents, forms an hydrographical system
which drain all of the department's territory. The "Pongo de Aguirre" is an
important canyon formed by the Huallaga in going through the andean hills.
San Martín is considered the future "Peru's
Granary" because of its proved possibilities regarding cattle and agriculture
production.
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