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| Santos,Luís Antônio Coutrim dos; Campos,Milton César Costa; Aquino,Renato Eleotério de; Bergamin,Anderson Cristian; Silva,Douglas Marcelo Pinheiro da; Marques Junior,Jose; França,Ana Beatriz Coelho. |
| As Terras Pretas Arqueológicas (TPAs) são unidades de solo que apresentam como características alta fertilidade, coloração escura e presença de fragmentos cerâmicos. Sobre a formação das TPAs, a hipótese mais bem aceita entre os pesquisadores é que essas foram originadas a partir de processos antrópicos provocados pelos homens pré-colombianos. Diante disso, objetivou-se caracterizar TPAs localizadas nos municípios de Apuí e Manicoré, na região sul do Estado do Amazonas. Foram selecionados sete locais de ocorrência de TPAs, sendo abertas trincheiras e os perfis do solo caracterizados morfologicamente. Procedeu-se à coleta de amostras de solo em cada horizonte para as seguintes análises físicas e químicas: composição granulométrica, argila dispersa em água,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pedogênese; Solos amazônicos; Solos antrópicos. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000400001 |
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| Silva,Douglas Marcelo Pinheiro da; Campos,Milton César Costa; Franciscon,Uilson; Alho,Leandro Coutinho; Santos,Luis Antônio Coutrim dos; Paula Neto,Pérsio de; Bergamin,Anderson Cristian; Souza,Zigomar Menezes de. |
| ABSTRACT Soils with an A horizon formed by human activity, an anthropogenic A horizon, are found in the Amazon Region. Few studies have examined the spatial distribution of the properties of these soils. We mapped the spatial variability of some soil properties in an area of Archaeological Dark Earth (ADE) in the Brazilian Amazon. A sampling grid was defined over an area of 42 × 88 m under cacao cultivation in which sampling points were established at a spacing of 6 × 8 m, for a total of 88 points. Samples were collected from the 0.00-0.05, 0.05-0.10, 0.10-0.20, and 0.20-0.30 m depth layers. Soil texture, aggregate stability, and organic carbon (OC) analyses were performed on disturbed soil samples. Undisturbed samples were used to determine soil... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Indian Dark Earth; Management systems; Amazon soils; Anthropogenic soils. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100415 |
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| Oliveira,Ivanildo Amorim de; Campos,Milton César Costa; Marques Junior,José; Aquino,Renato Eleotério de; Teixeira,Daniel de Bortoli; Silva,Douglas Marcelo Pinheiro da. |
| The lack of information concerning the variability of soil properties has been a major concern of researchers in the Amazon region. Thus, the aim of this study was to evaluate the spatial variability of soil chemical properties and determine minimal sampling density to characterize the variability of these properties in five environments located in the south of the State of Amazonas, Brazil. The five environments were archaeological dark earth (ADE), forest, pasture land, agroforestry operation, and sugarcane crop. Regular 70 × 70 m mesh grids were set up in these areas, with 64 sample points spaced at 10 m distance. Soil samples were collected at the 0.0-0.1 m depth. The chemical properties of pH in water, OM, P, K, Ca, Mg, H+Al, SB, CEC, and V were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Geostatistics; Amazonian soils; Archaeological dark earth; Sampling density. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000100031 |
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