Acidification evidences of no-tilled soils of the central region of Argentina

Empiric evidences indicate that agricultural soils of Argentina tend to acidify. The objective of this study was to determine the pH values of no-tilled and urea-fertilized-agricultural soils of Argentina during several years. Results indicated that both the actual pH (pHA) and the potential pH (pHP...

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Autores principales: Iturri, L. A., Buschiazzo, D. E., Díaz Zorita, M.
Formato: article Artículo publishedVersion
Lenguaje:Inglés
Publicado: 2011
Materias:
NITROGEN FERTILIZERS
SOIL ACIDIFICATION
SOIL DEGRADATION
ACIDIFICATION
AGRICULTURAL SOIL
DEGRADATION
FERTILIZER APPLICATION
GROWTH RESPONSE
MICROBIAL ACTIVITY
NITROGEN
PH
SOIL CHEMISTRY
UREA
ARGENTINA
Acceso en línea:http://ri.agro.uba.ar/greenstone3/library/collection/arti/document/2011Iturri
Aporte de:
FAUBA Digital - Facultad de Agronomía (UBA) de Universidad de Buenos Aires
id snrd:2011Iturri
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spelling snrd:2011Iturri2021-10-15T16:56:07Z Iturri, L. A. Buschiazzo, D. E. Díaz Zorita, M. 2011 Empiric evidences indicate that agricultural soils of Argentina tend to acidify. The objective of this study was to determine the pH values of no-tilled and urea-fertilized-agricultural soils of Argentina during several years. Results indicated that both the actual pH (pHA) and the potential pH (pHP) values were lower in humid than in dry environments. The ratio between «mean annual precipitation:mean annual temperature» of the sites explained between 60 and 80 percent of the variability in pH values. This suggests that climatic conditions were responsible for current soil pH values. The pHA was 1.14 points higher tan pHP in all studied sites (p less than 0.01), indicating that a generalized natural acidification process existed. In soils of drier environments, differences between both pHA and pHP were, on average, higher than 1.21, indicating a more intense acidification process. However, pH values were not low enough to affect the normal growth of crops and soil organisms. In soils of humid environments, differences between pHA and pHP were higher than 1.10, being pHA values (6.17 and 5.80) acidic enough to affect the microbial activity and the development of pH sensitive crops. Fertilization with urea decreased pHA between 0.18 and 0.32 points compared to non-fertilized treatments (p less than 0.05), indicating that fertilization contributed to a decrease in pH values in the studied soils. In conclusion, fertilization with urea slightly increased the natural tendency to soil acidification in most of the studied soils. application/pdf 0326-3169 http://ri.agro.uba.ar/greenstone3/library/collection/arti/document/2011Iturri eng info:eu-repo/semantics/openAccess openAccess http://ri.agro.uba.ar/greenstone3/library/page/biblioteca#section4 Ciencia del suelo : revista de la Asociación Argentina de la Ciencia del Suelo Vol.29, no.1 13-19 http://www.suelos.org.ar/ NITROGEN FERTILIZERS SOIL ACIDIFICATION SOIL DEGRADATION ACIDIFICATION AGRICULTURAL SOIL DEGRADATION FERTILIZER APPLICATION GROWTH RESPONSE MICROBIAL ACTIVITY NITROGEN PH SOIL CHEMISTRY UREA ARGENTINA Acidification evidences of no-tilled soils of the central region of Argentina article info:eu-repo/semantics/article info:ar-repo/semantics/artículo publishedVersion info:eu-repo/semantics/publishedVersion
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-140
collection FAUBA Digital - Facultad de Agronomía (UBA)
language Inglés
orig_language_str_mv eng
topic NITROGEN FERTILIZERS
SOIL ACIDIFICATION
SOIL DEGRADATION
ACIDIFICATION
AGRICULTURAL SOIL
DEGRADATION
FERTILIZER APPLICATION
GROWTH RESPONSE
MICROBIAL ACTIVITY
NITROGEN
PH
SOIL CHEMISTRY
UREA
ARGENTINA
spellingShingle NITROGEN FERTILIZERS
SOIL ACIDIFICATION
SOIL DEGRADATION
ACIDIFICATION
AGRICULTURAL SOIL
DEGRADATION
FERTILIZER APPLICATION
GROWTH RESPONSE
MICROBIAL ACTIVITY
NITROGEN
PH
SOIL CHEMISTRY
UREA
ARGENTINA
Iturri, L. A.
Buschiazzo, D. E.
Díaz Zorita, M.
Acidification evidences of no-tilled soils of the central region of Argentina
topic_facet NITROGEN FERTILIZERS
SOIL ACIDIFICATION
SOIL DEGRADATION
ACIDIFICATION
AGRICULTURAL SOIL
DEGRADATION
FERTILIZER APPLICATION
GROWTH RESPONSE
MICROBIAL ACTIVITY
NITROGEN
PH
SOIL CHEMISTRY
UREA
ARGENTINA
description Empiric evidences indicate that agricultural soils of Argentina tend to acidify. The objective of this study was to determine the pH values of no-tilled and urea-fertilized-agricultural soils of Argentina during several years. Results indicated that both the actual pH (pHA) and the potential pH (pHP) values were lower in humid than in dry environments. The ratio between «mean annual precipitation:mean annual temperature» of the sites explained between 60 and 80 percent of the variability in pH values. This suggests that climatic conditions were responsible for current soil pH values. The pHA was 1.14 points higher tan pHP in all studied sites (p less than 0.01), indicating that a generalized natural acidification process existed. In soils of drier environments, differences between both pHA and pHP were, on average, higher than 1.21, indicating a more intense acidification process. However, pH values were not low enough to affect the normal growth of crops and soil organisms. In soils of humid environments, differences between pHA and pHP were higher than 1.10, being pHA values (6.17 and 5.80) acidic enough to affect the microbial activity and the development of pH sensitive crops. Fertilization with urea decreased pHA between 0.18 and 0.32 points compared to non-fertilized treatments (p less than 0.05), indicating that fertilization contributed to a decrease in pH values in the studied soils. In conclusion, fertilization with urea slightly increased the natural tendency to soil acidification in most of the studied soils.
format article
Artículo
Artículo
publishedVersion
publishedVersion
author Iturri, L. A.
Buschiazzo, D. E.
Díaz Zorita, M.
author_facet Iturri, L. A.
Buschiazzo, D. E.
Díaz Zorita, M.
author_sort Iturri, L. A.
title Acidification evidences of no-tilled soils of the central region of Argentina
title_short Acidification evidences of no-tilled soils of the central region of Argentina
title_full Acidification evidences of no-tilled soils of the central region of Argentina
title_fullStr Acidification evidences of no-tilled soils of the central region of Argentina
title_full_unstemmed Acidification evidences of no-tilled soils of the central region of Argentina
title_sort acidification evidences of no-tilled soils of the central region of argentina
publishDate 2011
url http://ri.agro.uba.ar/greenstone3/library/collection/arti/document/2011Iturri
work_keys_str_mv AT iturrila acidificationevidencesofnotilledsoilsofthecentralregionofargentina
AT buschiazzode acidificationevidencesofnotilledsoilsofthecentralregionofargentina
AT diazzoritam acidificationevidencesofnotilledsoilsofthecentralregionofargentina
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