Chemical and physical properties of an anthropogenic dark earth soil from Bragança, Para, Eastern Amazon

ABSTRACT Although anthropogenic dark earth (ADE) is generally found in non-floodable land, it also occurs on floodplains but, there is no information about the chemical and physical characteristics of ADE in this environment. In this study, we propose to check the hypothesis that a Gleysol, classifi...
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Gespeichert in:

Autor*in:	Luma Castro de SOUZA [verfasserIn] Herdjania Veras de LIMA [verfasserIn] Sueli RODRIGUES [verfasserIn] Dirse Clara KERN [verfasserIn] Álvaro Pires da SILVA [verfasserIn] Jorge Luiz PICCININ [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch ; Spanisch ; Portugiesisch

Erschienen:	2016

Schlagwörter:	Anthropic horizon Soil organic carbon Soil quality Floodplain soils

Übergeordnetes Werk:	In: Acta Amazonica - Instituto Nacional de Pesquisas da Amazônia, 2004, 46(2016), 4, Seite 337-344
Übergeordnetes Werk:	volume:46 ; year:2016 ; number:4 ; pages:337-344

Links:	Link aufrufen Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.1590/1809-4392201505663

Katalog-ID:	DOAJ06301985X

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allfields	10.1590/1809-4392201505663 doi (DE-627)DOAJ06301985X (DE-599)DOAJ298909e8b7fd4226b81468f397342ceb DE-627 ger DE-627 rakwb eng spa por Q1-390 Luma Castro de SOUZA verfasserin aut Chemical and physical properties of an anthropogenic dark earth soil from Bragança, Para, Eastern Amazon 2016 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier ABSTRACT Although anthropogenic dark earth (ADE) is generally found in non-floodable land, it also occurs on floodplains but, there is no information about the chemical and physical characteristics of ADE in this environment. In this study, we propose to check the hypothesis that a Gleysol, classified as ADE, presents improved chemical and physical conditions than an adjacent soil, no anthropogenic. Thus, the objective of this study was to characterize the chemical and physical properties of the top layer of two ADE profiles in a Gleysol and compare them with an adjacent soil. Samples were taken from two areas classified as ADE in Bragança, Pará State, Brazil, at the "Jabuti" archaeological site, and from an adjacent non-anthropogenic site. Disturbed and undisturbed soil samples were collected at the soil depth of 0.05-0.10 m for chemical (pH, potential acidity, exchangeable cations, and soil organic carbon) and physical (soil particle size distribution, particles density, water retention curve, total porosity, microporosity, macroporosity, and bulk density) analysis. The two areas of ADE in a Gleysol, showed improved soil chemical properties compared to the adjacent soil, particularly in relation to phosphorus and calcium levels that contributed to higher cation exchange capacity which, in turn, was positively related to organic carbon content. Changes in soil physical properties were less noticeable but both areas of ADE presented higher water retention capacity, particularly at low tension. The improved conditions of the ADE soil under Gleysols shows that these areas are adequate for soil cultivation, especially with plants adapted to floodplain. Anthropic horizon Soil organic carbon Soil quality Floodplain soils Science (General) Herdjania Veras de LIMA verfasserin aut Sueli RODRIGUES verfasserin aut Dirse Clara KERN verfasserin aut Álvaro Pires da SILVA verfasserin aut Jorge Luiz PICCININ verfasserin aut In Acta Amazonica Instituto Nacional de Pesquisas da Amazônia, 2004 46(2016), 4, Seite 337-344 (DE-627)354194305 (DE-600)2088290-7 00445967 nnns volume:46 year:2016 number:4 pages:337-344 https://doi.org/10.1590/1809-4392201505663 kostenfrei https://doaj.org/article/298909e8b7fd4226b81468f397342ceb kostenfrei http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672016000400337&tlng=en kostenfrei http://www.scielo.br/pdf/aa/v46n4/1809-4392-aa-46-04-00337.pdf kostenfrei https://doaj.org/toc/0044-5967 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 46 2016 4 337-344
spelling	10.1590/1809-4392201505663 doi (DE-627)DOAJ06301985X (DE-599)DOAJ298909e8b7fd4226b81468f397342ceb DE-627 ger DE-627 rakwb eng spa por Q1-390 Luma Castro de SOUZA verfasserin aut Chemical and physical properties of an anthropogenic dark earth soil from Bragança, Para, Eastern Amazon 2016 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier ABSTRACT Although anthropogenic dark earth (ADE) is generally found in non-floodable land, it also occurs on floodplains but, there is no information about the chemical and physical characteristics of ADE in this environment. In this study, we propose to check the hypothesis that a Gleysol, classified as ADE, presents improved chemical and physical conditions than an adjacent soil, no anthropogenic. Thus, the objective of this study was to characterize the chemical and physical properties of the top layer of two ADE profiles in a Gleysol and compare them with an adjacent soil. Samples were taken from two areas classified as ADE in Bragança, Pará State, Brazil, at the "Jabuti" archaeological site, and from an adjacent non-anthropogenic site. Disturbed and undisturbed soil samples were collected at the soil depth of 0.05-0.10 m for chemical (pH, potential acidity, exchangeable cations, and soil organic carbon) and physical (soil particle size distribution, particles density, water retention curve, total porosity, microporosity, macroporosity, and bulk density) analysis. The two areas of ADE in a Gleysol, showed improved soil chemical properties compared to the adjacent soil, particularly in relation to phosphorus and calcium levels that contributed to higher cation exchange capacity which, in turn, was positively related to organic carbon content. Changes in soil physical properties were less noticeable but both areas of ADE presented higher water retention capacity, particularly at low tension. The improved conditions of the ADE soil under Gleysols shows that these areas are adequate for soil cultivation, especially with plants adapted to floodplain. Anthropic horizon Soil organic carbon Soil quality Floodplain soils Science (General) Herdjania Veras de LIMA verfasserin aut Sueli RODRIGUES verfasserin aut Dirse Clara KERN verfasserin aut Álvaro Pires da SILVA verfasserin aut Jorge Luiz PICCININ verfasserin aut In Acta Amazonica Instituto Nacional de Pesquisas da Amazônia, 2004 46(2016), 4, Seite 337-344 (DE-627)354194305 (DE-600)2088290-7 00445967 nnns volume:46 year:2016 number:4 pages:337-344 https://doi.org/10.1590/1809-4392201505663 kostenfrei https://doaj.org/article/298909e8b7fd4226b81468f397342ceb kostenfrei http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672016000400337&tlng=en kostenfrei http://www.scielo.br/pdf/aa/v46n4/1809-4392-aa-46-04-00337.pdf kostenfrei https://doaj.org/toc/0044-5967 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 46 2016 4 337-344
allfields_unstemmed	10.1590/1809-4392201505663 doi (DE-627)DOAJ06301985X (DE-599)DOAJ298909e8b7fd4226b81468f397342ceb DE-627 ger DE-627 rakwb eng spa por Q1-390 Luma Castro de SOUZA verfasserin aut Chemical and physical properties of an anthropogenic dark earth soil from Bragança, Para, Eastern Amazon 2016 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier ABSTRACT Although anthropogenic dark earth (ADE) is generally found in non-floodable land, it also occurs on floodplains but, there is no information about the chemical and physical characteristics of ADE in this environment. In this study, we propose to check the hypothesis that a Gleysol, classified as ADE, presents improved chemical and physical conditions than an adjacent soil, no anthropogenic. Thus, the objective of this study was to characterize the chemical and physical properties of the top layer of two ADE profiles in a Gleysol and compare them with an adjacent soil. Samples were taken from two areas classified as ADE in Bragança, Pará State, Brazil, at the "Jabuti" archaeological site, and from an adjacent non-anthropogenic site. Disturbed and undisturbed soil samples were collected at the soil depth of 0.05-0.10 m for chemical (pH, potential acidity, exchangeable cations, and soil organic carbon) and physical (soil particle size distribution, particles density, water retention curve, total porosity, microporosity, macroporosity, and bulk density) analysis. The two areas of ADE in a Gleysol, showed improved soil chemical properties compared to the adjacent soil, particularly in relation to phosphorus and calcium levels that contributed to higher cation exchange capacity which, in turn, was positively related to organic carbon content. Changes in soil physical properties were less noticeable but both areas of ADE presented higher water retention capacity, particularly at low tension. The improved conditions of the ADE soil under Gleysols shows that these areas are adequate for soil cultivation, especially with plants adapted to floodplain. Anthropic horizon Soil organic carbon Soil quality Floodplain soils Science (General) Herdjania Veras de LIMA verfasserin aut Sueli RODRIGUES verfasserin aut Dirse Clara KERN verfasserin aut Álvaro Pires da SILVA verfasserin aut Jorge Luiz PICCININ verfasserin aut In Acta Amazonica Instituto Nacional de Pesquisas da Amazônia, 2004 46(2016), 4, Seite 337-344 (DE-627)354194305 (DE-600)2088290-7 00445967 nnns volume:46 year:2016 number:4 pages:337-344 https://doi.org/10.1590/1809-4392201505663 kostenfrei https://doaj.org/article/298909e8b7fd4226b81468f397342ceb kostenfrei http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672016000400337&tlng=en kostenfrei http://www.scielo.br/pdf/aa/v46n4/1809-4392-aa-46-04-00337.pdf kostenfrei https://doaj.org/toc/0044-5967 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 46 2016 4 337-344
allfieldsGer	10.1590/1809-4392201505663 doi (DE-627)DOAJ06301985X (DE-599)DOAJ298909e8b7fd4226b81468f397342ceb DE-627 ger DE-627 rakwb eng spa por Q1-390 Luma Castro de SOUZA verfasserin aut Chemical and physical properties of an anthropogenic dark earth soil from Bragança, Para, Eastern Amazon 2016 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier ABSTRACT Although anthropogenic dark earth (ADE) is generally found in non-floodable land, it also occurs on floodplains but, there is no information about the chemical and physical characteristics of ADE in this environment. In this study, we propose to check the hypothesis that a Gleysol, classified as ADE, presents improved chemical and physical conditions than an adjacent soil, no anthropogenic. Thus, the objective of this study was to characterize the chemical and physical properties of the top layer of two ADE profiles in a Gleysol and compare them with an adjacent soil. Samples were taken from two areas classified as ADE in Bragança, Pará State, Brazil, at the "Jabuti" archaeological site, and from an adjacent non-anthropogenic site. Disturbed and undisturbed soil samples were collected at the soil depth of 0.05-0.10 m for chemical (pH, potential acidity, exchangeable cations, and soil organic carbon) and physical (soil particle size distribution, particles density, water retention curve, total porosity, microporosity, macroporosity, and bulk density) analysis. The two areas of ADE in a Gleysol, showed improved soil chemical properties compared to the adjacent soil, particularly in relation to phosphorus and calcium levels that contributed to higher cation exchange capacity which, in turn, was positively related to organic carbon content. Changes in soil physical properties were less noticeable but both areas of ADE presented higher water retention capacity, particularly at low tension. The improved conditions of the ADE soil under Gleysols shows that these areas are adequate for soil cultivation, especially with plants adapted to floodplain. Anthropic horizon Soil organic carbon Soil quality Floodplain soils Science (General) Herdjania Veras de LIMA verfasserin aut Sueli RODRIGUES verfasserin aut Dirse Clara KERN verfasserin aut Álvaro Pires da SILVA verfasserin aut Jorge Luiz PICCININ verfasserin aut In Acta Amazonica Instituto Nacional de Pesquisas da Amazônia, 2004 46(2016), 4, Seite 337-344 (DE-627)354194305 (DE-600)2088290-7 00445967 nnns volume:46 year:2016 number:4 pages:337-344 https://doi.org/10.1590/1809-4392201505663 kostenfrei https://doaj.org/article/298909e8b7fd4226b81468f397342ceb kostenfrei http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672016000400337&tlng=en kostenfrei http://www.scielo.br/pdf/aa/v46n4/1809-4392-aa-46-04-00337.pdf kostenfrei https://doaj.org/toc/0044-5967 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 46 2016 4 337-344
allfieldsSound	10.1590/1809-4392201505663 doi (DE-627)DOAJ06301985X (DE-599)DOAJ298909e8b7fd4226b81468f397342ceb DE-627 ger DE-627 rakwb eng spa por Q1-390 Luma Castro de SOUZA verfasserin aut Chemical and physical properties of an anthropogenic dark earth soil from Bragança, Para, Eastern Amazon 2016 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier ABSTRACT Although anthropogenic dark earth (ADE) is generally found in non-floodable land, it also occurs on floodplains but, there is no information about the chemical and physical characteristics of ADE in this environment. In this study, we propose to check the hypothesis that a Gleysol, classified as ADE, presents improved chemical and physical conditions than an adjacent soil, no anthropogenic. Thus, the objective of this study was to characterize the chemical and physical properties of the top layer of two ADE profiles in a Gleysol and compare them with an adjacent soil. Samples were taken from two areas classified as ADE in Bragança, Pará State, Brazil, at the "Jabuti" archaeological site, and from an adjacent non-anthropogenic site. Disturbed and undisturbed soil samples were collected at the soil depth of 0.05-0.10 m for chemical (pH, potential acidity, exchangeable cations, and soil organic carbon) and physical (soil particle size distribution, particles density, water retention curve, total porosity, microporosity, macroporosity, and bulk density) analysis. The two areas of ADE in a Gleysol, showed improved soil chemical properties compared to the adjacent soil, particularly in relation to phosphorus and calcium levels that contributed to higher cation exchange capacity which, in turn, was positively related to organic carbon content. Changes in soil physical properties were less noticeable but both areas of ADE presented higher water retention capacity, particularly at low tension. The improved conditions of the ADE soil under Gleysols shows that these areas are adequate for soil cultivation, especially with plants adapted to floodplain. Anthropic horizon Soil organic carbon Soil quality Floodplain soils Science (General) Herdjania Veras de LIMA verfasserin aut Sueli RODRIGUES verfasserin aut Dirse Clara KERN verfasserin aut Álvaro Pires da SILVA verfasserin aut Jorge Luiz PICCININ verfasserin aut In Acta Amazonica Instituto Nacional de Pesquisas da Amazônia, 2004 46(2016), 4, Seite 337-344 (DE-627)354194305 (DE-600)2088290-7 00445967 nnns volume:46 year:2016 number:4 pages:337-344 https://doi.org/10.1590/1809-4392201505663 kostenfrei https://doaj.org/article/298909e8b7fd4226b81468f397342ceb kostenfrei http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672016000400337&tlng=en kostenfrei http://www.scielo.br/pdf/aa/v46n4/1809-4392-aa-46-04-00337.pdf kostenfrei https://doaj.org/toc/0044-5967 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 46 2016 4 337-344
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source	In Acta Amazonica 46(2016), 4, Seite 337-344 volume:46 year:2016 number:4 pages:337-344
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author	Luma Castro de SOUZA
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topic_title	Q1-390 Chemical and physical properties of an anthropogenic dark earth soil from Bragança, Para, Eastern Amazon Anthropic horizon Soil organic carbon Soil quality Floodplain soils
topic	misc Q1-390 misc Anthropic horizon misc Soil organic carbon misc Soil quality misc Floodplain soils misc Science (General)
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title	Chemical and physical properties of an anthropogenic dark earth soil from Bragança, Para, Eastern Amazon
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title_sort	chemical and physical properties of an anthropogenic dark earth soil from bragança, para, eastern amazon
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title_auth	Chemical and physical properties of an anthropogenic dark earth soil from Bragança, Para, Eastern Amazon
abstract	ABSTRACT Although anthropogenic dark earth (ADE) is generally found in non-floodable land, it also occurs on floodplains but, there is no information about the chemical and physical characteristics of ADE in this environment. In this study, we propose to check the hypothesis that a Gleysol, classified as ADE, presents improved chemical and physical conditions than an adjacent soil, no anthropogenic. Thus, the objective of this study was to characterize the chemical and physical properties of the top layer of two ADE profiles in a Gleysol and compare them with an adjacent soil. Samples were taken from two areas classified as ADE in Bragança, Pará State, Brazil, at the "Jabuti" archaeological site, and from an adjacent non-anthropogenic site. Disturbed and undisturbed soil samples were collected at the soil depth of 0.05-0.10 m for chemical (pH, potential acidity, exchangeable cations, and soil organic carbon) and physical (soil particle size distribution, particles density, water retention curve, total porosity, microporosity, macroporosity, and bulk density) analysis. The two areas of ADE in a Gleysol, showed improved soil chemical properties compared to the adjacent soil, particularly in relation to phosphorus and calcium levels that contributed to higher cation exchange capacity which, in turn, was positively related to organic carbon content. Changes in soil physical properties were less noticeable but both areas of ADE presented higher water retention capacity, particularly at low tension. The improved conditions of the ADE soil under Gleysols shows that these areas are adequate for soil cultivation, especially with plants adapted to floodplain.
abstractGer	ABSTRACT Although anthropogenic dark earth (ADE) is generally found in non-floodable land, it also occurs on floodplains but, there is no information about the chemical and physical characteristics of ADE in this environment. In this study, we propose to check the hypothesis that a Gleysol, classified as ADE, presents improved chemical and physical conditions than an adjacent soil, no anthropogenic. Thus, the objective of this study was to characterize the chemical and physical properties of the top layer of two ADE profiles in a Gleysol and compare them with an adjacent soil. Samples were taken from two areas classified as ADE in Bragança, Pará State, Brazil, at the "Jabuti" archaeological site, and from an adjacent non-anthropogenic site. Disturbed and undisturbed soil samples were collected at the soil depth of 0.05-0.10 m for chemical (pH, potential acidity, exchangeable cations, and soil organic carbon) and physical (soil particle size distribution, particles density, water retention curve, total porosity, microporosity, macroporosity, and bulk density) analysis. The two areas of ADE in a Gleysol, showed improved soil chemical properties compared to the adjacent soil, particularly in relation to phosphorus and calcium levels that contributed to higher cation exchange capacity which, in turn, was positively related to organic carbon content. Changes in soil physical properties were less noticeable but both areas of ADE presented higher water retention capacity, particularly at low tension. The improved conditions of the ADE soil under Gleysols shows that these areas are adequate for soil cultivation, especially with plants adapted to floodplain.
abstract_unstemmed	ABSTRACT Although anthropogenic dark earth (ADE) is generally found in non-floodable land, it also occurs on floodplains but, there is no information about the chemical and physical characteristics of ADE in this environment. In this study, we propose to check the hypothesis that a Gleysol, classified as ADE, presents improved chemical and physical conditions than an adjacent soil, no anthropogenic. Thus, the objective of this study was to characterize the chemical and physical properties of the top layer of two ADE profiles in a Gleysol and compare them with an adjacent soil. Samples were taken from two areas classified as ADE in Bragança, Pará State, Brazil, at the "Jabuti" archaeological site, and from an adjacent non-anthropogenic site. Disturbed and undisturbed soil samples were collected at the soil depth of 0.05-0.10 m for chemical (pH, potential acidity, exchangeable cations, and soil organic carbon) and physical (soil particle size distribution, particles density, water retention curve, total porosity, microporosity, macroporosity, and bulk density) analysis. The two areas of ADE in a Gleysol, showed improved soil chemical properties compared to the adjacent soil, particularly in relation to phosphorus and calcium levels that contributed to higher cation exchange capacity which, in turn, was positively related to organic carbon content. Changes in soil physical properties were less noticeable but both areas of ADE presented higher water retention capacity, particularly at low tension. The improved conditions of the ADE soil under Gleysols shows that these areas are adequate for soil cultivation, especially with plants adapted to floodplain.
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title_short	Chemical and physical properties of an anthropogenic dark earth soil from Bragança, Para, Eastern Amazon
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Chemical and physical properties of an anthropogenic dark earth soil from Bragança, Para, Eastern Amazon

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