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Registro Completo |
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
02/04/2018 |
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Data da última atualização: |
11/11/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
PINHEIRO, H. S. K.; CARVALHO JUNIOR, W. de; CHAGAS, C. da S.; ANJOS, L. H. C. dos; OWENS, P. R. |
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Afiliação: |
HELENA SARAIVA KOENOW PINHEIRO, UFRRJ; WALDIR DE CARVALHO JUNIOR, CNPS; CESAR DA SILVA CHAGAS, CNPS; LÚCIA HELENA CUNHA DOS ANJOS, UFRRJ; PHILLIP RAY OWENS, USDA. |
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Título: |
Prediction of topsoil texture through regression trees and multiple linear regressions. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Revista Brasileira de Ciência do Solo, v. 42, article e0170167, 2018. |
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DOI: |
https://doi.org/10.1590/18069657rbcs20170167 |
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Idioma: |
Inglês |
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Conteúdo: |
Users of soil survey products are mostly interested in understanding how soil properties vary in space and time. The aim of digital soil mapping (DSM) is to represent the spatial variability of soil properties quantitatively to support decision-making. The goal of this study is to evaluate DSM techniques (Regression Trees - RT and Multiple Linear Regressions - MLR) and the ability of these tools to predict mineral fraction content under a wide variability of landscapes. The study site was the entire Guapi-Macacu watershed (1,250.78 km²) in the state of Rio de Janeiro in the Southeast region of Brazil. Terrain attributes and remote sensing data (with 30 m of spatial resolution) were used to represent landscape co-variables selected as an input in predictive models in order to develop the explanatory variables. The selection of sampling sites was based on the Latin Hypercube algorithm. A representative set of one hundred points with feasible field access was chosen. Different input databases were tested for prediction of mineral fraction content (harmonized and original data). The Spline algorithm was used to harmonize data according to the GlobalSoil.Net consortium standards. The results showed better performance from the RT models, using input from an average of six covariates; the simplest MLR model used twice as many input variables, creating more complex models without gaining precision. Furthermore, better R² values were obtained using RT models, irrespective of harmonization of soil data. The harmonized dataset from the 0.00-0.05 and 0.05-0.15 m layers, in general, presented better results for the clay and silt, with R2 values of 0.52 (0.00-0.05 m) and 0.69 (0.05-0.15 m), respectively. Prediction of sand content showed better results when the original depth data was used as an input, although all regression tree models had R2 values greater than 0.52. The RT models provided a better statistical index than MLR for all predicted properties; however, the variance between models suggests similarity of performance. Regarding harmonization of soil data, both input databases (harmonized or not) can be used to predict soil properties, since the variance of model performance was low and generalization of the soil maps showed similar trends. The products obtained from the digital soil mapping approach make it possible to integrate the factor of uncertainties, providing easier interpretation for soil management and land use decisions. MenosUsers of soil survey products are mostly interested in understanding how soil properties vary in space and time. The aim of digital soil mapping (DSM) is to represent the spatial variability of soil properties quantitatively to support decision-making. The goal of this study is to evaluate DSM techniques (Regression Trees - RT and Multiple Linear Regressions - MLR) and the ability of these tools to predict mineral fraction content under a wide variability of landscapes. The study site was the entire Guapi-Macacu watershed (1,250.78 km²) in the state of Rio de Janeiro in the Southeast region of Brazil. Terrain attributes and remote sensing data (with 30 m of spatial resolution) were used to represent landscape co-variables selected as an input in predictive models in order to develop the explanatory variables. The selection of sampling sites was based on the Latin Hypercube algorithm. A representative set of one hundred points with feasible field access was chosen. Different input databases were tested for prediction of mineral fraction content (harmonized and original data). The Spline algorithm was used to harmonize data according to the GlobalSoil.Net consortium standards. The results showed better performance from the RT models, using input from an average of six covariates; the simplest MLR model used twice as many input variables, creating more complex models without gaining precision. Furthermore, better R² values were obtained using RT models, irrespective of harmoniz... Mostrar Tudo |
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Palavras-Chave: |
Atributos do terreno; Funções de profundidade do solo; Mapeamento digital do solo; Modelos de regressão. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/174786/1/2018-010.pdf
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Marc: |
LEADER 03254naa a2200229 a 4500
001 2089994
005 2021-11-11
008 2018 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1590/18069657rbcs20170167$2DOI
100 1 $aPINHEIRO, H. S. K.
245 $aPrediction of topsoil texture through regression trees and multiple linear regressions.$h[electronic resource]
260 $c2018
520 $aUsers of soil survey products are mostly interested in understanding how soil properties vary in space and time. The aim of digital soil mapping (DSM) is to represent the spatial variability of soil properties quantitatively to support decision-making. The goal of this study is to evaluate DSM techniques (Regression Trees - RT and Multiple Linear Regressions - MLR) and the ability of these tools to predict mineral fraction content under a wide variability of landscapes. The study site was the entire Guapi-Macacu watershed (1,250.78 km²) in the state of Rio de Janeiro in the Southeast region of Brazil. Terrain attributes and remote sensing data (with 30 m of spatial resolution) were used to represent landscape co-variables selected as an input in predictive models in order to develop the explanatory variables. The selection of sampling sites was based on the Latin Hypercube algorithm. A representative set of one hundred points with feasible field access was chosen. Different input databases were tested for prediction of mineral fraction content (harmonized and original data). The Spline algorithm was used to harmonize data according to the GlobalSoil.Net consortium standards. The results showed better performance from the RT models, using input from an average of six covariates; the simplest MLR model used twice as many input variables, creating more complex models without gaining precision. Furthermore, better R² values were obtained using RT models, irrespective of harmonization of soil data. The harmonized dataset from the 0.00-0.05 and 0.05-0.15 m layers, in general, presented better results for the clay and silt, with R2 values of 0.52 (0.00-0.05 m) and 0.69 (0.05-0.15 m), respectively. Prediction of sand content showed better results when the original depth data was used as an input, although all regression tree models had R2 values greater than 0.52. The RT models provided a better statistical index than MLR for all predicted properties; however, the variance between models suggests similarity of performance. Regarding harmonization of soil data, both input databases (harmonized or not) can be used to predict soil properties, since the variance of model performance was low and generalization of the soil maps showed similar trends. The products obtained from the digital soil mapping approach make it possible to integrate the factor of uncertainties, providing easier interpretation for soil management and land use decisions.
653 $aAtributos do terreno
653 $aFunções de profundidade do solo
653 $aMapeamento digital do solo
653 $aModelos de regressão
700 1 $aCARVALHO JUNIOR, W. de
700 1 $aCHAGAS, C. da S.
700 1 $aANJOS, L. H. C. dos
700 1 $aOWENS, P. R.
773 $tRevista Brasileira de Ciência do Solo$gv. 42, article e0170167, 2018.
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Registro original: |
Embrapa Solos (CNPS) |
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Biblioteca |
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Origem |
Tipo/Formato |
Classificação |
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Registro |
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Registro Completo
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Biblioteca(s): |
Embrapa Uva e Vinho. |
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Data corrente: |
03/01/2018 |
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Data da última atualização: |
30/04/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
SILVA, V. P. da; KAYDAN, M. B.; MALAUSA, T.; GERMAIN, J. F.; PALERO, F.; BOTTON, M. |
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Afiliação: |
Vitor C. Pacheco da Silva, Plant Protection Graduate Program, Plant Protection Department, UFPel, Pelotas, RS, Brazil; Mehmet Bora Kaydan, Imamoglu Vocational School, Çukurova University, Adana, Turkey.; Thibaut Malausa, INRA, Univ. Nice Sophia Antipolis, CNRS, UMR 1355?7254 Institut Sophia Agrobiotech, 06900, Sophia, Antipolis, France; Jean-François Germain, Anses, Laboratoire de la Santé des Végétaux, Unité d?Entomologie et Plantes Invasives, Montferrier-sur-Lez, France.; Ferran Palero, Dept. Marine Ecology, Centro de Estudios Avanzados de Blanes, Blanes, Spain; MARCOS BOTTON, CNPUV. |
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Título: |
Integrative taxonomy methods reveal high mealybug (Hemiptera: Pseudococcidae) diversity in southern Brazilian fruit crops. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Scientific Reports, v. 7, n. 15741, p. 1-9, 2017. |
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Idioma: |
Inglês |
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Conteúdo: |
The Serra Gaúcha region is the most important temperate fruit-producing area in southern Brazil. Despite mealybugs (Hemiptera: Pseudococcidae) infesting several host plants in the region, there is a lack of information about the composition of species damaging different crops. A survey of mealybug species associated with commercial fruit crops (apple, persimmon, strawberry and grapes) was performed in Serra Gaúcha between 2013 and 2015, using both morphology and DNA analyses for species identification. The most abundant species were Pseudococcus viburni (Signoret), found on all four host plant species, and Dysmicoccus brevipes (Cockerell), infesting persimmon, vines and weeds. The highest diversity of mealybug species was found on persimmon trees, hosting 20 different taxa, of which Anisococcus granarae Pacheco da Silva & Kaydan, D. brevipes, Pseudococcus sociabilis Hambleton and Ps. viburni were the most abundant. A total of nine species were recorded in vineyards. Planococcus ficus (Signoret) and Pseudococcus longispinus (Targioni Tozzetti) were observed causing damage to grapes for the first time. A single species, Ps. viburni, was found associated with apples, while both Ps. viburni and Ferrisia meridionalis Williams were found on strawberry. Four of the mealybug species found represent new records for Brazil. |
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Palavras-Chave: |
Brasil; Coijas; Plantas hospedeiras; Serra Gaúcha. |
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Thesagro: |
Fruta de clima temperado; Hemiptera; Praga de planta. |
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Thesaurus NAL: |
Pseudococcidae; Pseudococcus. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/170189/1/PachecodaSilvaetal.2017IntegrativetaxonomyMealybugs2017.pdf
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Marc: |
LEADER 02171naa a2200289 a 4500
001 2084073
005 2019-04-30
008 2017 bl uuuu u00u1 u #d
100 1 $aSILVA, V. P. da
245 $aIntegrative taxonomy methods reveal high mealybug (Hemiptera$bPseudococcidae) diversity in southern Brazilian fruit crops.$h[electronic resource]
260 $c2017
520 $aThe Serra Gaúcha region is the most important temperate fruit-producing area in southern Brazil. Despite mealybugs (Hemiptera: Pseudococcidae) infesting several host plants in the region, there is a lack of information about the composition of species damaging different crops. A survey of mealybug species associated with commercial fruit crops (apple, persimmon, strawberry and grapes) was performed in Serra Gaúcha between 2013 and 2015, using both morphology and DNA analyses for species identification. The most abundant species were Pseudococcus viburni (Signoret), found on all four host plant species, and Dysmicoccus brevipes (Cockerell), infesting persimmon, vines and weeds. The highest diversity of mealybug species was found on persimmon trees, hosting 20 different taxa, of which Anisococcus granarae Pacheco da Silva & Kaydan, D. brevipes, Pseudococcus sociabilis Hambleton and Ps. viburni were the most abundant. A total of nine species were recorded in vineyards. Planococcus ficus (Signoret) and Pseudococcus longispinus (Targioni Tozzetti) were observed causing damage to grapes for the first time. A single species, Ps. viburni, was found associated with apples, while both Ps. viburni and Ferrisia meridionalis Williams were found on strawberry. Four of the mealybug species found represent new records for Brazil.
650 $aPseudococcidae
650 $aPseudococcus
650 $aFruta de clima temperado
650 $aHemiptera
650 $aPraga de planta
653 $aBrasil
653 $aCoijas
653 $aPlantas hospedeiras
653 $aSerra Gaúcha
700 1 $aKAYDAN, M. B.
700 1 $aMALAUSA, T.
700 1 $aGERMAIN, J. F.
700 1 $aPALERO, F.
700 1 $aBOTTON, M.
773 $tScientific Reports$gv. 7, n. 15741, p. 1-9, 2017.
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Embrapa Uva e Vinho (CNPUV) |
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