Ferramentas Matemáticas, Suscetibilidade Magnética E Modelos De Paisagem Aplicados Na Delimitação De Áreas De Manejo Específico

Matías, Sammy Sidney Rocha; Júnior, José Marques; Pereira, Gener Tadeu; Siqueira, Diego Silva

doi:10.1590/01000683rbcs20140638

Cited by 6 publications

(7 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…All data from the 87 sampling points of the properties sand, silt, clay, and organic carbon contents and MS were subjected to Split Moving Window (SMW) autocorrelogram analysis , to confirm the landscape compartments (Matias et al, 2015;Siqueira et al, 2015). This evaluation is based on statistical calculations of dissimilarity between the sequences of sample points collected along the transect.…”

Section: Discussionmentioning

confidence: 99%

“…In tropical soils, MS has been used to indicate the relationship between landscape and iron oxides, considered indicators of the factors and processes of soil formation Matias et al, 2014Matias et al, , 2015. For being directly related with iron oxides, MS is a covariate of soil mineralogical properties and consequently of different pedogenetic environments, here called landscape compartments (relief).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Magnetic Susceptibility of Soil to Differentiate Soil Environments in Southern Brazil

Ramos¹,

Dalmolin²,

Júnior³

et al. 2017

Rev. Bras. Ciênc. Solo

Self Cite

View full text Add to dashboard Cite

ABSTRACT:The interest in new techniques to support digital soil mapping (DSM) is increasing. Numerous studies pointed out that the measure of magnetic susceptibility (MS) can be extremely useful in the identification of properties related with factors and processes of soil formation, applied to soil mapping. This study addressed the effectiveness of magnetic soil susceptibility to identify and facilitate the distinction of different pedogenic environments of a representative hillslope in the highland Planalto Médio in the state of Rio Grande do Sul (RS), Brazil. In a 350-ha area in the municipality of Santo Augusto, RS, a representative transect was selected, trenches opened for soil characterization and 29 grid points marked at regular distances of 50 m, where soil samples were collected (layers 0.00-0. 05, 0.05-0.15, 0.15-0.30, and 0.30-0.60 m) to analyze soil properties. Data from the transect samples were subjected to descriptive statistics. Limits of the pedogenetic environments along the slope were identified by the Split Moving Window (SMW) Boundary Analysis. The combined use of soil magnetic susceptibility and the SMW technique was effective in identifying different pedogenetic environments in the study area.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Magnetic Susceptibility of Soil to Differentiate Soil Environments in Southern Brazil

Ramos¹,

Dalmolin²,

Júnior³

et al. 2017

Rev. Bras. Ciênc. Solo

Self Cite

View full text Add to dashboard Cite

show abstract

“…Using magnetic signature to identify distinctive environments in areas grown with sugarcane under mechanized harvesting, Matias et al (2015) found groups within a Euclidean distance between 18 and 24 and subgroups from 6 to 16. Unlike, Barbieri et al (2014) used crystallographic characteristics of iron oxide minerals to outline management groups in areas under BC and UC.…”

Section: Resultsmentioning

confidence: 99%

Magnetic Susceptibility as Indicator of Soil Quality in Sugarcane Fields

et al. 2017

Self Cite

View full text Add to dashboard Cite

-Sugarcane management practices (unburned cane -UC and burned cane -BC) interfere with dynamics of soil magnetic properties. This study focused on determining the potential of magnetic susceptibility as soil quality indicator in areas under sugarcane cultivation. The experiment area is on the limit between basalt from São Bento Group, Serra Geral Formation, and sandstone from Bauru Group -Adamantina Formation. Twenty soil samples were collected from two management areas (burned and unburned sugarcane prior to harvest) at a depth range of 0.0-0.2 m. Local soil was classified as eutroferric Red Latosol (Oxisol), with highly clayey texture. Chemical and physical properties, CO 2 emissions and magnetic susceptibility (MS) in air-dried fine earth (MS ADFE ), total sand fraction (MS TS ) and clay fraction (MS CF ). The magnetic signature from MS was effective in identifying changes of physical, chemical and mineralogical traits in Latosols under burned and unburned sugarcane crop. The information provided here can guide further studies on the genesis of minerals with magnetic expression in environments and exposed to fire burning.Keywords: Magnetic signature. Applied Geophysics. Neo-formation. Multivariate Statistics. SUSCETIBILIDADE MAGNÉTICA COMO INDICADOR DE QUALIDADE DO SOLO EM ÁREAS SOB CULTIVO DE CANA-DE-AÇÚCARRESUMO -As práticas de manejo utilizadas na cultura da cana-de-açúcar (cana crua -CC e cana queimada -CQ) interferem na dinâmica dos atributos e expressão magnética do solo. Foi estudado o potencial da suscetibilidade magnética como indicador de qualidade do solo em áreas sob cultivo de cana-de-açúcar. O experimento localiza-se em uma área limítrofe de material de origem, entre o Basalto do Grupo São Bento, Formação Serra Geral, e o Arenito do Grupo Bauru, Formação Adamantina. Foram coletadas 20 amostras de solo em dois sistemas de manejo (com e sem queima da cana-de-açúcar para colheita) na profundidade de 0,0-0,2 m. O solo foi classificado como Latossolo Vermelho Eutroférrico, textura muito argilosa. Foram avaliados os atributos químicos, físicos, emissão de CO 2 e a suscetibilidade magnética (SM) do solo na terra fina seca ao ar (SM TFSA ), fração total sand (SM AT ) e fração argila (SM ARG ). A assinatura magnética expressa pela suscetibilidade magnética foi eficaz na identificação de mudanças nas características físicas, químicas e mineralógicas de Latossolos sob sistemas de colheita da cana-de-açúcar com e sem queima. As informações geradas neste trabalho podem balizar futuros estudos sobre a gênese de minerais com expressão magnética em ambientes e expostos a presença de fogo.Palavras -chave: Assinatura magnética. Geofísica aplicada. Neoformação. Estatística Multivariada.

show abstract

“…The sampling density was 1 sample per 7 ha (Figure 1). The highest sample density was observed in the northsouth direction, coinciding with the direction of greater variability in soil attributes Matias et al, 2015). The area was split into 33 plots, covering 24 ha in average.…”

Section: Methodsmentioning

confidence: 99%

“…Recently, Siqueira et al (2010a) used it for the quantification of physical, chemical, and mineralogical attributes of soils with low iron content, i.e., less than 4% as Fe 2 O 3 . Magnetic susceptibility has also been used in sugarcane plantations in Brazil to identify areas with different potentials for soil CO 2 emission (Barrios et al, 2012;Leal et al, 2015) and with different capacity to endure vinasse application (Peluco et al, 2013), as well as to quantify adsorbed phosphorus (Peluco et al, 2015) and to map management units (Matias et al, 2015;Siqueira et al, 2015). However, few works focus on identifying the relationship between magnetic susceptibility and plant characteristics .…”

Section: Introductionmentioning

confidence: 99%

Magnetic susceptibility for characterizing areas with different potentials for sugarcane production

Siqueira

Júnior

Teixeira

et al. 2016

Pesq. agropec. bras.

Self Cite

View full text Add to dashboard Cite

-The objective of this work was to evaluate the use of magnetic susceptibility for characterizing the spatial variability of soil attributes and identifying areas with different potentials for sugarcane (Saccharum spp.) production. Samples were collected at 110 points (1 per 7 ha) in the layers of 0.00-0.20 and 0.20-0.40 m, to determine the magnetic susceptibility and physical and chemical attributes of the soil. Fiber content, sucrose polarization (POL), and sugarcane yield were determined in 33 points. The spatial variability model for magnetic susceptibility was 63 and 22% more accurate in delimiting soil potential for sugarcane production than soil physical and chemical attributes at the 0.0-0.2 and 0.2-0.4-m layers, respectively. The spatial variability map for magnetic susceptibility was strongly correlated with clay (0.83 and 0.89, respectively, for the layers) and sand contents (-0.84 and -0.88); moderately correlated with organic matter (-0.25 and -0.35), sum of bases (-0.46 and 0.37), cation exchange capacity (0.22 and 0.47), pH (-0.52 and 0.13), and POL (0.43 and 0.53); and weakly correlated with sugarcane yield (0.26 and 0.23). Magnetic susceptibility can be used to characterize the spatial variability of soil attributes and to identify areas with different potentials for sugarcane production.Index terms: detailed mapping, geostatistics, indirect quantification, pedometrics, scaled semivariogram, spatial correlation. Susceptibilidade magnética para a caracterização de áreas com diferentes potenciais de produção de cana-de-açúcarResumo -O objetivo deste trabalho foi avaliar o uso da susceptibilidade magnética para caracterizar a variabilidade espacial dos atributos do solo e identificar áreas com diferentes potenciais de produção de cana-de-açúcar (Saccharum spp.). Foram coletadas amostras em 110 pontos (1 por cada 7 ha), nas camadas de 0,00-0,20 e 0,20-0,40 m, para determinação da suscetibilidade magnética e de atributos físicos e químicos do solo. O teor de fibra, a polarização da sacarose (POL) e a produtividade da cana-de-açúcar foram determinados em 33 pontos. O modelo de variabilidade espacial da susceptibilidade magnética foi 63 e 22% mais acurado em delimitar o potencial do solo para produção da cana-de-açúcar que os atributos físicos e químicos do solo, nas camadas de 0,00-0,20 e de 0,20-0,40 m de profundidade, respectivamente. O mapa da variabilidade espacial da susceptibilidade magnética apresentou forte correlação com o conteúdo de argila (0,83 e 0,89, respectivamente, para as camadas) e de areia (-0,84 e -0,88); moderada correlação com a matéria orgânica (-0,25 e -0,35), a soma de bases (-046 e 0,37), a capacidade de troca catiônica (0,22 e 0,47), o pH (-0,52 e 0,13) e a POL (0,43 e 0,53); e fraca correlação com a produtividade da cana-de-açúcar (0,26 e 0,23). A susceptibilidade magnética pode ser utilizada para caracterizar a variabilidade espacial dos atributos do solo e para identificar áreas com diferentes potenciais para produção de cana-de-açúcar.Termos para indexação: mape...

show abstract

Ferramentas Matemáticas, Suscetibilidade Magnética E Modelos De Paisagem Aplicados Na Delimitação De Áreas De Manejo Específico

Cited by 6 publications

References 26 publications

Magnetic Susceptibility of Soil to Differentiate Soil Environments in Southern Brazil

Magnetic Susceptibility of Soil to Differentiate Soil Environments in Southern Brazil

Magnetic Susceptibility as Indicator of Soil Quality in Sugarcane Fields

Magnetic susceptibility for characterizing areas with different potentials for sugarcane production

Contact Info

Product

Resources

About