Consulta: subjectFacets:"Singularity spectrum"
Registros recuperados: 2
Data/hora: 10/06/2024 18:20:32

Multifractal analysis of soil penetration resistance under sugarcane cultivation
Provedor de dados: 91
Autores: Leiva,Jairo O. R.; Silva,Raimunda A.; Buss,Ricardo N.; França,Victor L.; Souza,Anderson A.; Siqueira,Glécio M.
ABSTRACT Soil resistance to penetration (PR) is an indirect measure of the state of soil compaction. Thus, the objective of this study was to characterize PR in vertical profiles in an area cultivated with sugarcane using multifractal models for different relief units. The experiment was carried out in an Oxisol with a clay texture, with 6.85 ha in the municipality of Coelho Neto (Maranhão state, Brazil), where 60 sampling points were demarcated. The area was divided into four relief units (Type A &gt; 74 m, Type B from 71 to 74 m, Type C from 68 to 71 m and Type D from 65 to 68 m). The PR was measured at the 60 sampling points using an impact penetrometer, and the PR determined in the 0-0.60 m depth layer every 0.01 m. The multifractal analysis was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fractal geometry; Fractal dimension; Singularity spectrum; Geostatistics; Soil management.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000700538

Multifractal analysis of soil fauna diversity indexes
Provedor de dados: 53
Autores: Silva,Raimunda Alves; Siqueira,Glécio Machado.
ABSTRACT The objective of this study was to determine the multifractality of diversity indexes of edaphic fauna in areas with natural vegetation and in agricultural systems. Biological sampling was carried out in seven treatments (millet, maize, soybean, eucalyptus, preserved cerrado, disturbed cerrado and pasture), containing 130 pitfall traps, distributed in transects with 3 m of spacing between sampling points, totaling 390 m. The multifractal analysis was determined based on the moment method, where estimates such as the capacity dimensions, entropy and the correlation of the diversity indexes were calculated. The soybean area had greater Shannon diversity (2.69), however it had smaller abundance of individuals. The partition functions were adjusted...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ecological modelling; Arthropods communities; Multifractality; Generalized dimension; Singularity spectrum.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052020000100120