Soil–landscape relationship in a sandstone-gneiss topolithosequence in the State of Amazonas, Brazil

Fonseca, Julimar da Silva; Campos, Milton César Costa; Filho, Elilson Gomes de Brito; Mantovanelli, Bruno Campos; Silva, Laércio Santos; Lima, Alan Ferreira Leite de; Cunha, José Maurício da; Simões, Emily Lira; Santos, Luís Antônio Coutrim dos

doi:10.1007/s12665-021-10026-9

Cited by 10 publications

(5 citation statements)

References 58 publications

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“…With regard to geology, the study area is formed by sedimentary materials formed by claystones and siltstones from the Solimões Formation, from the Middle Pliocene -Upper Pleistocene, originating from depositions of continental, fluvial and lake environments (Brasil 1978). In these environments, there are Haplic Cambisols (Inceptisols), Haplic Gleissolos (Alfisols) and Red Ultisols (Ultisols), all characterized by low natural fertility and located in areas of flat to smooth undulating relief (Fonseca et al 2021).…”

Section: Location and Characterization Of The Study Areasmentioning

confidence: 99%

Estimating soil erodibility in areas under natural and anthropped environments in the southern region of Amazonas State

Hassane,

Campos,

Santos

et al. 2023

Bragantia

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Amazonian soils have been suffering severe changes resulting from human activities in the region, causing significant changes in soil attributes that can contribute to greater susceptibility to erosion processes. Therefore, the present work aimed to estimate the erodibility in natural and anthropic environments in the southern region of the Amazon. Eight areas in the region were selected, including areas of native forest, savannah, cerradão, pasture and reforestation, delimiting 32 sampling points per area, with collections at a depth of 0.00-0.20 m, totaling 256 samples. Next, texture analysis and quantification of soil organic carbon were performed, and then erodibility was estimated by indirect prediction methods, Tukey's test, Pearson's correlation and factorial analysis of principal components. According to the results obtained, it was observed that the evaluated areas of native forest 1 and 2, cerradão and pasture present high susceptibility to erosion in relation to the cerrado, reforestation with genipap, teak and mixed areas. Therefore, it was noted that the high level of erodibility is associated with a greater predominance of sand fraction, K factor, Ki Kr and low clay content, as well as with the management employed in the areas.

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Section: Location and Characterization Of The Study Areasmentioning

confidence: 99%

Estimating soil erodibility in areas under natural and anthropped environments in the southern region of Amazonas State

Hassane,

Campos,

Santos

et al. 2023

Bragantia

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“…This result is due to the clay factor, which is of fundamental importance in explaining most of the existing variability and influences the management systems. The clay fraction of tropical and subtropical soils is dominated by minerals such as kaolinite, Fe and Al sesquioxides, 2:1 expansive clay minerals, illite (Fonseca et al, 2021). Thus, due to the domain of kaolinite, in quantitative terms, it is the main component of the clay fraction of most tropical and subtropical soils, thus being an important component to act in the processes of alteration of the soil structure.…”

Section: Guaranámentioning

confidence: 99%

“…The Amazon region is located in the northern part of South America with about 6 million km². In this region, the Amazon Biome is characterized by being a very extensive region, with high geological, geomorphological, edaphic, climatic and vegetation diversity (Fonseca et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Impacts of Forest-Agriculture Conversion on Soil Physical-Water Attributes in Amazon Basin, Southeastern Brazil

Souza¹,

Mantovanelli²,

Almeida³

et al. 2023

JSD

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Several studies have shown that negative changes in physical attributes affect root growth and plant development. Thus, the objective of this work was to evaluate the impacts of forest-agricultural conversion on the physical-water attributes of the soil in the Amazon basin, southeastern Brazil. The study was carried out in Canutama - AM, in which areas of annatto, cupuaçu and guarana cultivation and a forest area were selected. Meshes of 90 m x 70 m, 90 m x 56 m and 54 m x 42 m were established, comprising 80 sampling points per layer. The points were georeferenced and the undisturbed soil samples were collected in volumetric rings to determine the physical and hydric attributes. data were submitted to descriptive statistics and multivariate analysis. It was observed that aspects such as the implementation time of the different use and occupation systems can be controlling factors for the restoration of these physical properties.

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“…The spatial variations of soil attributes are influenced by pedogenetic processes (Fonseca et al 2021), as well as by human activities (Brito et al 2022). The understanding in the variation in soil characteristics makes it possible to understand the connections between soils and environmental conditions (Goovaerts, 1998) thus helping in soil use practices (Plant, 2001) favoring the proper management of the area and providing sustainability to the systems of production.…”

Section: Introductionmentioning

confidence: 99%

Geostatistics and Sample Density of Chemical Attributes for Soil under Sugarcane and Agroforestry in Humaitá – AM, Brazil

Oliveira¹,

Campos²,

Santos³

et al. 2023

JSD

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There is a lack of studies focusing on spatial variance of chemical attributes in Amazonas, Brazil. The objective of this study was to evaluate geo-statistics and sample density of chemical attributes in soils under sugarcane and agroforestry, Humaitá, Amazon state, Brazil. The research was carried out in the municipality of Humaitá, Amazon state, the areas were in meshes of 70 m x 70 m regularly spaced by 10 m, with 64 points per area, and then soil samples were collected in layers of 0.0-0.2 m and 0.4-0.6 m. We performed chemical analyses of the proprieties of soil. Then, it was applied descriptive statistics, geo-statistics and sample density techniques based on semivariogram coefficient of variation and range. As a result, we observed spatial dependence for most of the chemical proprieties in the two areas. Based on Cline, sugarcane presented a sample density of 237 (0.0-0.2 m) and 225 (0.4-0.6 m); and agroforestry had 356 (0.0-0.2 m) and 465 (0.4-0.6 m) points per hectare. Yet in the range sample density, sugarcane showed 30 (0.0-0.2 m) and 5 (0.4-0.6 m), whereas agroforestry areas had 23 (0.0-0.2 m) and 9 (0.4-0.6 m) points per ha.

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Soil–landscape relationship in a sandstone-gneiss topolithosequence in the State of Amazonas, Brazil

Cited by 10 publications

References 58 publications

Estimating soil erodibility in areas under natural and anthropped environments in the southern region of Amazonas State

Estimating soil erodibility in areas under natural and anthropped environments in the southern region of Amazonas State

Impacts of Forest-Agriculture Conversion on Soil Physical-Water Attributes in Amazon Basin, Southeastern Brazil

Geostatistics and Sample Density of Chemical Attributes for Soil under Sugarcane and Agroforestry in Humaitá – AM, Brazil

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