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Caracterização de plintitas e petroplintitas em solos da depressão central do Rio Grande do Sul Ciência Rural
Miguel,Pablo; Dalmolin,Ricardo Simão Diniz; Pedron,Fabrício de Araújo; Fink,Jessé Rodrigo; Moura-Bueno,Jean Michel.
A presença, composição e distribuição de concreções ferruginosas no solo, denominadas de plintitas e petroplintitas, é condicionada às características ambientais da região, atribuindo propriedades intrínsecas ao solo. O objetivo do estudo foi caracterizar plintitas e petroplintitas de solos da Depressão Central do Rio Grande do Sul através da avaliação de características químicas e mineralógicas dessas feições. Para tanto, procedeu-se à caracterização química, morfológica e granulométrica de três perfis de solo. As concreções ferruginosas presentes em alguns horizontes foram separadas da matriz do solo e submetidas, separadamente, a sucessivos procedimentos de extrações seletivas de Fe e Al. Os horizontes dos solos apresentaram ampla variação de textura e...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Argissolos; Plintossolos; Plintização; Pedogênese; Mineralogia.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013000600009
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Prediction of soil classes in a complex landscape in Southern Brazil PAB
Moura-Bueno,Jean Michel; Dalmolin,Ricardo Simão Diniz; Horst-Heinen,Taciara Zborowski; Cancian,Luciano Campos; Schenato,Ricardo Bergamo; Dotto,André Carnieletto; Flores,Carlos Alberto.
Abstract: The objective of this work was to evaluate the use of covariate selection by expert knowledge on the performance of soil class predictive models in a complex landscape, in order to identify the best predictive model for digital soil mapping in the Southern region of Brazil. A total of 164 points were sampled in the field using the conditioned Latin hypercube, considering the covariates elevation, slope, and aspect. From the digital elevation model, environmental covariates were extracted, composing three sets, made up of: 21 covariates, covariates after the exclusion of the multicollinear ones, and covariates chosen by expert knowledge. Prediction was performed with the following models: decision tree, random forest, multiple logistic regression,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Digital soil mapping; Pedometry; Predictive covariates; Predictive models; Soil-landscape relationship.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000103808
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Digital soil mapping and its implications in the extrapolation of soil-landscape relationships in detailed scale PAB
Wolski,Mario Sergio; Dalmolin,Ricardo Simão Diniz; Flores,Carlos Alberto; Moura-Bueno,Jean Michel; Caten,Alexandre ten; Kaiser,Douglas Rodrigo.
Abstract: The objective of this work was to test the extrapolation of soil-landscape relationships in a reference area (RA) to a topographic map (scale 1:50,000), using digital soil mapping (DSM), and to compare these results to those obtained in similar studies previously conducted in Brazil. A soil survey in a 10 km2 RA, using conventional mapping techniques (scale 1:10,000), was made in order to map a 678 km2 physiographically similar area (scale 1:50,000) using DSM. The decision tree technique was employed to build a predictive extrapolation model based on soil classes and eight terrain attributes in the RA. The validation of DSM by application of field observation points resulted in a 66.1% global accuracy and in 0.36 kappa index. The most...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Landscape stratification; Pedometrics; Predictive soil mapping; Reference area; Terrain attributes..
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000800633
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Identificação de fontes de produção de sedimentos em uma bacia hidrográfica de encosta Rev. Bras. Ciênc. Solo
Miguel,Pablo; Dalmolin,Ricardo Simão Diniz; Pedron,Fabrício de Araújo; Moura-Bueno,Jean Michel; Tiecher,Tales.
O uso do solo fora de sua aptidão agrícola é o que norteia a degradação dos recursos naturais por meio das atividades antrópicas. As atividades agropecuárias estão entre as que mais perturbam o meio ambiente, expondo o solo à ação dos processos erosivos e acelerando a transferência de sedimentos aos corpos de água. Nos últimos anos, o método fingerprinting para identificação de fontes de sedimentos tem sido utilizado com sucesso no mundo, porém, trabalhos dessa natureza realizados no Brasil ainda estão em caráter incipiente. O objetivo deste trabalho foi estimar a proporção de contribuição das principais fontes de produção de sedimentos de uma bacia hidrográfica de encosta, onde predominam solos rasos e agricultura menos intensiva no sistema familiar. Essa...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fingerprinting; Elementos traçadores; Erosão hídrica; Áreas de encosta.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000200023
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Edaphic and Topographic Factors and their Relationship with Dendrometric Variation of Pinus Taeda L. in a High Altitude Subtropical Climate Rev. Bras. Ciênc. Solo
Horst,Taciara Zborowski; Dalmolin,Ricardo Simão Diniz; Caten,Alexandre ten; Moura-Bueno,Jean Michel; Cancian,Luciano Campos; Pedron,Fabrício de Araújo; Schenato,Ricardo Bergamo.
ABSTRACT The study of the relationships between the yield potential of forest stands and the conditions offered for plant development is fundamental for the adequate management of the forest when aiming at sustainable high yields. However, these relations are not clear, especially in commercial forests, on rugged terrain where relationships between the landscape, soil, and plants are more complex. Considering this, we tested the hypothesis that the morphological aspects of the soil conditioned by topography are the main limiting factors for tree development. Our objective was to evaluate the edaphic and topographic influence on the dendrometric variation of Pinus taeda L. of a forest stand in a subtropical climate at high altitude. For that, Spearman’s...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Forest soil; Soil-landscape relationship; Forest site; Soil use; Forest zoning.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100318
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Potential of Spectroradiometry to Classify Soil Clay Content Rev. Bras. Ciênc. Solo
Dotto,André Carnieletto; Dalmolin,Ricardo Simão Diniz; Caten,Alexandre ten; Moura-Bueno,Jean Michel.
ABSTRACT Diffuse reflectance spectroscopy (DRS) is a fast and cheap alternative for soil clay, but needs further investigation to assess the scope of application. The purpose of the study was to develop a linear regression model to predict clay content from DRS data, to classify the soils into three textural classes, similar to those defined by a regulation of the Brazilian Ministry of Agriculture, Livestock and Food Supply. The DRS data of 412 soil samples, from the 0.0-0.5 m layer, from different locations in the state of Rio Grande do Sul, Brazil, were measured at wavelengths of 350 to 2,500 nm in the laboratory. The fitting of the linear regression model developed to predict soil clay content from the DRS data was based on a R2 value of 0.74 and 0.75,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil texture; Diffuse reflectance of the soil; Proximal soil sensing.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100301
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How is the learning process of digital soil mapping in a diverse group of land use planners? Rev. Bras. Ciênc. Solo
Dalmolin,Ricardo Simão Diniz; Moura-Bueno,Jean Michel; Samuel-Rosa,Alessandro; Flores,Carlos Alberto.
ABSTRACT The use of new technologies, the development of new software, and the advances in the machines ability to process data have brought a new perspective to soil science and especially to pedology, with the advent of digital soil mapping (DSM). To meet the demand for soil surveys in Brazil, it will be necessary to popularize the techniques used in DSM. To identify and map the soil to generate maps of land use capability, we proposed a theoretical and practical course focused on the training in DSM for professionals involved in the management of land resources. The methodology was divided into five modules: I. Introduction to pedology, soil-landscape relationship, soil survey and soil classification (theory); II. Identification of soils in the field...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Expert knowledge; Pedometry; PronaSolos; Soil education; Soil survey.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832020000100600
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Variáveis mineralógicas preditoras de fontes de produção de sedimentos, em uma bacia hidrográfica do Rio Grande do Sul Rev. Bras. Ciênc. Solo
Miguel,Pablo; Dalmolin,Ricardo Simão Diniz; Pedron,Fabrício de Araújo; Moura-Bueno,Jean Michel.
O uso da mineralogia como ferramenta para a avaliação das propriedades dos minerais que compõem o solo é extremamente importante para o entendimento das diferentes relações químicas e físicas que ocorrem nele. Essas propriedades/variáveis, na identificação das fontes de sedimentos em suspensão, podem ajudar a elucidar os fatores e processos que regem a transferência de sedimentos e poluentes dos sistemas terrestres para os sistemas aquáticos. Os objetivos deste estudo foram caracterizar quantitativamente a mineralogia do solo das fontes e dos sedimentos em suspensão, em uma bacia hidrográfica, e identificar quais variáveis mineralógicas possuem propriedades traçadoras. Para a identificação das fontes, foi utilizado o método fingerprinting, que compara os...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fingerprinting; Elementos traçadores; Mineralogia.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000300010
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Magnetic Susceptibility of Soil to Differentiate Soil Environments in Southern Brazil Rev. Bras. Ciênc. Solo
Ramos,Priscila Vogelei; Dalmolin,Ricardo Simão Diniz; Marques Júnior,José; Siqueira,Diego Silva; Almeida,Jaime Antonio de; Moura-Bueno,Jean Michel.
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,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pedometrics; Geomorphology; Detailed mapping.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100301
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Assessment of Digital Elevation Model for Digital Soil Mapping in a Watershed with Gently Undulating Topography Rev. Bras. Ciênc. Solo
Moura-Bueno,Jean Michel; Dalmolin,Ricardo Simão Diniz; ten Caten,Alexandre; Ruiz,Luis Fernando Chimelo; Ramos,Priscila Vogelei; Dotto,André Carnieletto.
ABSTRACT Terrain attributes (TAs) derived from digital elevation models (DEMs) are frequently used in digital soil mapping (DSM) as auxiliary covariates in the construction of prediction models. The DEMs and information extracted from it may be limited with regard to the spatial resolution and error magnitude, and can differ in the behavior of terrain features. The objective of this study was to evaluate the quality and limitations of free DEM data and to evaluate a topographic survey (TS) underlying the choice of a more appropriate model, for use in DSMs at a scale of 1:10,000. The study was conducted in an area of 937 ha in the watershed of Lajeado Giruá, in southern Brazil. The DEMs: DEM-TS, DEM-Topographic Map (TM), DEM-ASTER, DEM-SRTM, and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Terrain modeling; DEM quality; DEM scale; Terrain attributes; Soil mapping.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100304
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Replacing the (inefficient) manual runoff sampling method used in Brazil – a prototype sample splitter Scientia Agricola
Samuel-Rosa,Alessandro; Moura-Bueno,Jean Michel; Dalmolin,Ricardo Simão Diniz.
ABSTRACT The method used to sample the runoff collected from soil erosion plots can be a significant source of error. In this study, we performed a laboratory experiment to evaluate the efficiency of the runoff sampling method most commonly used in Brazil. It is based on the manual homogenization and sampling of the collected runoff. Using soil material with 583 g kg–1 of sand and 89 g kg–1 of clay, the manual sampling method was tested for its ability to produce representative samples of artificial suspensions with a concentration of 2, 10 and 50 g L–1 of total solids. An underestimation of 30 % or more of the concentration of total solids was observed, with a variation of the same magnitude (CV between 20 and 45 %). We then developed a prototype sample...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Erosion monitoring; Soil loss; Sandy soil; Uncertainty.
Ano: 2021 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000401402
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Open legacy soil survey data in Brazil: geospatial data quality and how to improve it Scientia Agricola
Samuel-Rosa,Alessandro; Dalmolin,Ricardo Simão Diniz; Moura-Bueno,Jean Michel; Teixeira,Wenceslau Geraldes; Alba,José Maria Filippini.
ABSTRACT: Spatial soil data applications require sound geospatial data including coordinates and a coordinate reference system. However, when it comes to legacy soil data we frequently find them to be missing or incorrect. This paper assesses the quality of the geospatial data of legacy soil observations in Brazil, and evaluates geospatial data sources (survey reports, maps, spatial data infrastructures, web mapping services) and expert knowledge as a means to fix inconsistencies. The analyses included several consistency checks performed on 6,195 observations from the Brazilian Soil Information System. The positional accuracy of geospatial data sources was estimated so as to obtain an indication of the quality for fixing inconsistencies. The coordinates...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Free Brazilian Repository for Open Soil Data; PronaSolos; Pedometrics; Soil data recovery; Digital soil mapping.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162020000101401
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Diffuse reflectance spectroscopy for estimating soil organic carbon and make nitrogen recommendations Scientia Agricola
Rosin,Nicolas Augusto; Dalmolin,Ricardo Simão Diniz; Horst-Heinen,Taciara Zborowski; Moura-Bueno,Jean Michel; Silva-Sangoi,Daniely Vaz da; Silva,Leandro Souza da.
ABSTRACT: Diffuse reflectance spectroscopy (DRS) has the potential to predict soil organic carbon (SOC). However, it is still little used as a matter of routine in soil laboratories in Brazil. The objective of this study was to make evaluations as to whether SOC predicted by spectral techniques can replace measurement by routine chemical methods with no loss in quality and be applied in the recommendation of nitrogen fertilizer as well as identifying the best prediction strategies to use. A data set containing 2,471 samples from six soil spectral libraries (SSL) was used to develop spectroscopic models for SOC content prediction, including consideration of sample stratification and preprocessing techniques. The SOC was quantified through the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil attributes prediction; Soil fertility; Proximal soil sensing; Chemometric; Green chemistry.
Ano: 2021 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000501402
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