Degradation Red Ferralitic lixiviated soils and indicators of the Red Valley Havana
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Abstract
paying attention to the problems related with the
anthropogenic influence in changes of soil properties,
principally at tropical regions for the intensive and continued
agriculture use. These investigations are little gone aboard in
Cuba, so that in this paper are presenting some results about
this problem in Red Lixiviated Ferralitic soils (RLF). These soils
occupy about to 150 000 hectares in old Havana province (now
Mayabeque and Artemisa province), and they are one of the
best agricultural soils of the country. However, they have been
submitted during over two centuries to the agricultural
exploitation, initially with cultivations like tobacco, sugar cane,
coffee and at a later time with viands, grains and vegetables,
with models in occasions of tall raw materials, most of all in
1975-1990�??s period. Taking the above into account we had
study the properties of 38 soils profiles of RFL soils in relation
with to the use to which they have been subdued, grouping in
pattern profiles (under wooded land of forests of over 40 years),
preserved (under pasturelands or 20-30�??s wooded lands years)
and agrogenics (under permanent cultivation during a lot of
years). The impacts in the biological activity of the soils and
the decrease of the relative productivity of the agrogenic soils
respect to the soil pattern were examined besides. Finally a
series of indicators are proposed to the different type of soils
(pattern, preserved and agrogenic) and is emphasized that the
sostenibility of the soils in this ecosystem is given to maintain
an adequate content in organic matter, than together with the
contents and type of clay and the one iron content maintains
a formation of a good structure in them.
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