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Chilean Journal of Agricultural Research
Instituto de Investigaciones Agropecuarias, INIA
ISSN: 0718-5820 EISSN: 0718-5820
Vol. 77, No. 4, 2017, pp. 406-412
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Bioline Code: cj17051
Full paper language: English
Document type: Research Article
Document available free of charge
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Chilean Journal of Agricultural Research, Vol. 77, No. 4, 2017, pp. 406-412
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Characterization of tirsification soil weathering processes: The case of Los Lirios wetland, Guadalquivir basin, Seville, Spain
Recio, José Manuel; Sandoval, Marco A.; Borja, Cesareo; Díaz, Fernando; Borja, Francisco & Ubera, José
Abstract
The “Andalusian Black Lands” (Chromatic Vertisols)
are soils of great ecological and productive importance,
emphasizes their fertility, however, their formation is
still a reason for discussion. The main objective of this
work was to analyze the most recent geomorphological
and environmental evolution and the physical-chemical
behavior of some parameters along its profile (Chromatic
Vertisols). This study was conducted in Los Lirios wetland
of the Guadalquivir basin (Seville, Spain). In addition,
samples were obtained in an exploration of the bottom of
this wetland for a study on pollen. Samples were obtained
to a depth of 260 cm every 6 cm in the 120 cm upper soil
layer. Physicochemical characteristics of samples were
determined in the laboratory. A total number of 20 samples
were evaluated, 11 of which correspond to the 65 cm of
compact horizons submitted to tirsification. Radiocarbon
dating (C14) was performed by Beta Analytic (Miami,
Florida, USA). The results indicate the formation of a
cumulative glacis and a subsequent environmental change
towards more hydromorphic conditions might account
for the surface and physical-chemical processes that
characterize this alterological process, which generates
soils of high ecological significance and agricultural
productivity.
Keywords
Black soil forming; wetland Andalusia; Spain.
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