12 documents found, page 1 of 2
Training pedologist for soil mapping: Contextualizing methods and its accuracy ...
Costa,Elias Mendes; Ceddia,Marcos Bacis; Santos,Felipe Nascimento dos; Silva,Laiz de Oliveira; Rezende,Igor Prata Terra deABSTRACT There is a growing demand for more detailed knowledge about soils, their functions, and connections with human activities and environmental services. In Brazil, where soil survey and mapping have been scarce since the 1990s, there is a remarkable sense of urgency. Recently, a national soil program was created (PronaSolos) to attend to the massive demand for soil information. PronaSolos is an effort to ...
Relationship between remote sensing data and field-observed interril erosion
Moraes,André Geraldo de Lima; Carvalho,Daniel Fonseca de; Antunes,Mauro Antonio Homem; Ceddia,Marcos BacisAbstract: The objective of this work was to evaluate the relationship between different remote sensing data, derived from satellite images, and interrill soil losses obtained in the field by using a portable rainfall simulator. The study was carried out in an area of a hydrographic basin, located in Médio Paraíba do Sul, in the state of Rio de Janeiro - one of the regions most affected by water erosion in Brazi...
Spatial and temporal patterns of soil water content in an agroecological produc...
Neves,Hugo Hermsdorff das; Mata,Maria Gabriela Ferreira da; Guerra,José Guilherme Marinho; Carvalho,Daniel Fonseca de; Wendroth,Ole OttoABSTRACT: Spatial and temporal patterns of soil water content (SWC) can not only improve the understanding of soil water processes but also the water management in the field. The spatial distribution of SWC depends on the spatial variability of soil attributes, vegetation and landscape features. The aim of this study was to evaluate: i) the spatial and temporal variability pattern in an agroecological system; i...
The use of Pedotransfer functions and the estimation of carbon stock in the Cen...
Gomes,Andréa da Silva; Ferreira,Ana Carolina de Souza; Pinheiro,Érika Flávia Machado; Menezes,Michele Duarte de; Ceddia,Marcos BacisABSTRACT Computer models have been used to assess soil organic carbon (SOC) stock change. Commonly, models require to determine soil bulk density (Db), a variable that is often lacking in soil data bases. To partly overcome this problem, pedotransfer functions (PTFs) are developed to estimate Db from other easily available soil properties. However, only a few studies have determined the accuracy of these functi...
CURVATURA DA SUPERFÍCIE E SEU EFEITO NA VARIABILIDADE ESPACIAL DOS ATRIBUTOS DO...
Santos,Gilsonley Lopes dos; Pereira,Marcos Gervasio; Lima,Sandra Santana de; Ceddia,Marcos Bacis; Mendonça,Victória Maria Monteiro; Delgado,Rafael CollRESUMO Compreender a variabilidade espacial dos atributos químicos e físicos do solo é importante para melhorar as práticas de manejo e conservação do solo. Por sua vez, a variabilidade espacial das propriedades do solo resulta da variação das características morfológicas do relevo. Assim, o objetivo deste estudo foi avaliar a influência da curvatura da superfície na variabilidade espacial dos atributos químico...
SPATIAL VARIABILITY AND VITALITY OF EPIGEOUS TERMITE MOUNDS IN PASTURES OF MATO...
Lima,Sandra Santana; Ceddia,Marcos Bacis; Zuchello,Fernando; Aquino,Adriana Maria de; Mercante,Fábio Martins; Alves,Bruno José RodriguesEpigeous termite mounds are frequently observed in pasture areas, but the processes regulating their population dynamics are poorly known. This study evaluated epigeous termite mounds in cultivated grasslands used as pastures, assessing their spatial distribution by means of geostatistics and evaluating their vitality. The study was conducted in the Cerrado biome in the municipality of Rio Brilhante, Mato Gross...
Detrending non stationary data for geostatistical applications
Vieira,Sidney Rosa; Carvalho,José Ruy Porto de; Ceddia,Marcos Bacis; González,Antonio PazThe use of geostatistics requires at least that the intrinsic hypothesis be satisfied. The presence of a trend in the data invalidates this hypothesis. One of the ways of solving this problem is by subtracting a function fitted to the original data and working with the residuals. This technique also represents a change to a smaller scale of the variability and surface roughness. This paper describes the detrend...
Spatial variability of maximum annual daily rain under different return periods...
Machado,Roriz Luciano; Ceddia,Marcos Bacis; Carvalho,Daniel Fonseca de; Cruz,Eleandro Silva da; Francelino,Marcio RochaKnowledge of maximum daily rain and its return period in a region is an important tool to soil conservation, hydraulic engineering and preservation of road projects. The objective of this work was to evaluate the spatial variability of maximum annual daily rain considering different return periods, at the Rio de Janeiro State. The data set was composed by historical series of 119 rain gauges, for 36 years of ob...
Spatial variability of microbial biomass and organic matter labile pools in a h...
Loureiro,Diego Campana; De-Polli,Helvécio; Ceddia,Marcos Bacis; Aquino,Adriana Maria deThe objective of this work was to study the spatial variability of soil microbial biomass (SMB) and labile soil organic matter pools (labile SOM), under different management systems and plant cover. The experiment was conducted in a Haplic Planosol soil on an Integrated Agroecological Production System (SIPA), in Seropédica, Rio de Janeiro. The evaluated management systems were: alley cropping, pasture, and bus...
Topography and spatial variability of soil physical properties
Ceddia,Marcos Bacis; Vieira,Sidney Rosa; Villela,André Luis Oliveira; Mota,Lenilson dos Santos; Anjos,Lúcia Helena Cunha dos; Carvalho,Daniel Fonseca deAmong the soil formation factors, relief is one of the most used in soil mapping, because of its strong correlation with the spatial variability of soil attributes over a landscape. In this study the relationship between topography and the spatial variability of some soil physical properties was evaluated. The study site, a pasture with 2.84 ha, is located near Seropédica, Rio de Janeiro State, Brazil, where a ...