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	Provedor de dados ArchiMer (3) Autor Chapron, Bertrand (3) Donlon, Craig J. (3) Girard-ardhuin, Fanny (3) Shutler, Jamie D. (3) Woolf, David K. (3) Goddijn-murphy, Lonneke (2) Land, Peter E. (2) Nightingale, Philip D. (2) Paul, Frederic (2) Piolle, Jean-francois (2) Ardhuin, Fabrice (1) Ashton, Ian (1) Bange, Hermann W. (1) Brown, Ian (1) Holding, Thomas (1) Hoyer, Jacob L. (1) Johannessen, Johnny A. (1) Kock, Annette (1) Pereira, Ryan (1) Platt, Trevor (1) Mais... Palavra-chave Atmosphere-ocean gas fluxes (1) Atmosphere-ocean interface (1) Oceanography (1) Remote sensing (1) Sea ice (1) Storm surge (1) Surface currents (1) Surface heat fluxes (1) Mais... Tipo do documento Text (3) Ano 2019 (1) 2016 (2) País France (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 47 Primeira ... 1 2 3 ... Última Kinetics of K release from soils of Brazilian coffee regions: effect of organic acids Rev. Bras. Ciênc. Solo Silva,Vladimir Antônio; Marchi,Giuliano; Guilherme,Luiz Roberto Guimarães; Lima,José Maria de; Nogueira,Francisco Dias; Guimarães,Paulo Tácito Gontijo. Kinetic studies on soil potassium release can contribute to a better understanding of K availability to plants. This study was conducted to evaluate K release rates from the whole soil, clay, silt, and sand fractions of B-horizon samples of a basalt-derived Oxisol and a sienite-derived Ultisol, both representative soils from coffee regions of Minas Gerais State, Brazil. Potassium was extracted from each fraction after eight different shaking time periods (0-665 h) with either 0.001 mol L-1 citrate or oxalate at a 1:10 solid:solution ratio. First-order, Elovich, zero-order, and parabolic diffusion equations were used to parameterize the time dependence of K release. For the Oxisol, the first-order equation fitted best to the experimental data of K release,... Tipo: Info:eu-repo/semantics/article Palavras-chave: Successive extractions; First order; Zero order; Parabolic diffusion; Elovich. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832008000200008 Replication of an ivg protocol to estimate bioaccessible arsenic in materials from a gold mining area in Brazil Rev. Bras. Ciênc. Solo Ono,Fábio Benedito; Guilherme,Luiz Roberto Guimarães; Mendes,Leandro Antunes; Carvalho,Geila Santos. Tests for bioaccessibility are useful in human health risk assessment. No research data with the objective of determining bioaccessible arsenic (As) in areas affected by gold mining and smelting activities have been published so far in Brazil. Samples were collected from four areas: a private natural land reserve of Cerrado; mine tailings; overburden; and refuse from gold smelting of a mining company in Paracatu, Minas Gerais. The total, bioaccessible and Mehlich-1-extractable As levels were determined. Based on the reproducibility and the accuracy/precision of the in vitro gastrointestinal (IVG) determination method of bioaccessible As in the reference material NIST 2710, it was concluded that this procedure is adequate to determine bioaccessible As in... Tipo: Info:eu-repo/semantics/article Palavras-chave: Trace elements; In vitro tests; Environmental pollution. Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000400029 Selenato e selenito na produção, nutrição mineral e biofortificação com selênio em cultivares de alface¹ Rev. Bras. Ciênc. Solo Ramos,Sílvio Júnio; Faquin,Valdemar; Almeida,Hilário Júnior de; Ávila,Fabrício William; Guilherme,Luiz Roberto Guimarães; Bastos,Carla Elisa Alves; Ávila,Patrícia Andressa. O selênio (Se) é um importante elemento ligado a processos fisiológicos na planta, microrganismos, animais e seres humanos. No entanto, para as plantas, seu modo de ação e sua essencialidade são ainda motivos de controvérsia. No Brasil, é relevante a falta de informações sobre o Se nas culturas agrícolas, havendo ainda indicativo de baixa ingestão desse elemento pela população. Assim, este estudo objetivou avaliar a influência da aplicação de selenato e selenito na biofortificação com Se e o efeito dessas formas de Se nos teores de macro e micronutrientes em cultivares de alface. Utilizou-se o delineamento experimental inteiramente casualizado, em esquema fatorial 5 x 3 x 2, sendo cinco cultivares de alface (Maravilha de Verão, Rafaela, Great Lakes,... Tipo: Info:eu-repo/semantics/article Palavras-chave: Lactuca sativa; Teor de selênio; Micronutriente; Macronutriente. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000400029 Characterization and nutrient release from silicate rocks and influence on chemical changes in soil Rev. Bras. Ciênc. Solo Silva,Douglas Ramos Guelfi; Marchi,Giuliano; Spehar,Carlos Roberto; Guilherme,Luiz Roberto Guimarães; Rein,Thomaz Adolpho; Soares,Danilo Araújo; Ávila,Fabrício William. The expansion of Brazilian agriculture has led to a heavy dependence on imported fertilizers to ensure the supply of the growing food demand. This fact has contributed to a growing interest in alternative nutrient sources, such as ground silicate rocks. It is necessary, however, to know the potential of nutrient release and changes these materials can cause in soils. The purpose of this study was to characterize six silicate rocks and evaluate their effects on the chemical properties of treated soil, assessed by chemical extractants after greenhouse incubation. The experimental design consisted of completely randomized plots, in a 3 x 6 factorial scheme, with four replications. The factors were potassium levels (0-control: without silicate rock... Tipo: Info:eu-repo/semantics/article Palavras-chave: Multi-nutrient fertilizer; Nutrient available; Potassic rock; Rock powder; Soil amendment. Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000300025 Teores de arsênio e cádmio em solos do bioma cerrado Rev. Bras. Ciênc. Solo Campos,Mari Lucia; Guilherme,Luiz Roberto Guimarães; Marques,João José Granate de Sá e Melo; Curi,Nilton; Araújo,Alessandra Siqueira Antunes; Miquelluti,David José; Lopes,Claudia; Spiazzi,Fábio Rodrigues. O conhecimento do teor natural de As e Cd em solos é importante para monitorar o risco de possível entrada desses elementos na cadeia alimentar por fontes antropogênicas. Neste contexto, o objetivo deste trabalho foi determinar o teor natural de As e Cd em solos representativos do bioma Cerrado. Foram coletados solos de três sub-regiões: G (leste de Goiás), T (Triângulo Mineiro) e N (nordeste de MG). Para determinar os teores de As e Cd, as amostras de solo foram submetidas à digestão em forno de micro-ondas, protocolo USEPA 3051A, determinação em espectrometria de absorção atômica com atomização eletro térmica. Os teores médios de As decresceram na seguinte ordem: sub-região G (3,29 mg kg-1) > sub-região T (2,18 mg kg-1) > sub-região N (0,62 mg... Tipo: Info:eu-repo/semantics/article Palavras-chave: Elementos tóxicos; Concentração natural; Cerrado. Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000100029 Agronomic efficiency of potassium fertilization in lettuce fertilized with alternative nutrient sources Rev. Ciênc. Agron. Guelfi-Silva,Douglas Ramos; Marchi,Giuliano; Spehar,Carlos Roberto; Guilherme,Luiz Roberto Guimarães; Faquin,Valdemar. The aim of this study was to evaluate the effect of alternative sources of nutrients on the nutrition, yield and efficiency of potassium fertilization in lettuce. The experiment was carried out in a greenhouse, using 3.7 kg pots filled with a dystrophic red-yellow Latosol of medium texture. The experimental design was randomized, with treatments divided into a 4 x 6 factorial: four doses of potassium (0; 200; 400; 600 kg ha-1 K2O) and six alternative sources of nutrients (breccia, ultramafic, biotite schist, phlogopite, and mining and Chapada by-products), with four replications. Content and accumulation were determined for potassium (K), copper (Cu), zinc (Zn) and nickel (Ni) in the lettuce shoots, and from these data two indices were calculated for the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Lactuca sativa L; Silicate rocks; Mining by-products. Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902013000200008 Biosolids and heavy metals in soils Scientia Agricola Silveira,Maria Lucia Azevedo; Alleoni,Luís Reynaldo Ferracciú; Guilherme,Luiz Roberto Guimarães. The application of sewage sludge or biosolids on soils has been widespread in agricultural areas. However, depending on their characteristics, they may cause increase in heavy metal concentration of treated soils. In general, domestic biosolids have lower heavy metal contents than industrial ones. Origin and treatment method of biosolids may markedly influence their characteristics. The legislation that controls the levels of heavy metal contents in biosolids and the maximum concentrations in soils is still controversial. In the long-term, heavy metal behavior after the and of biosolid application is still unknown. In soils, heavy metals may be adsorbed via specific or non-specific adsorption reactions. Iron oxides and organic matter are the most important... Tipo: Info:eu-repo/semantics/article Palavras-chave: Sewage sludge; Adsorption; Speciation; PH; Organic matter. Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000400029 Lead sorption and leaching from an Inceptisol sample amended with sugarcane vinasse Scientia Agricola Ribeiro,Bruno Teixeira; Lima,José Maria de; Guilherme,Luiz Roberto Guimarães; Julião,Luiz Gustavo Fernandes. Vinasse is produced at high amounts by the ethanol and sugarcane spirits industries. Although the effects of vinasse on soil attributes are well elucidated, little is known about its effects on sorption and leaching of lead (Pb) from soils. This work evaluated the Pb sorption and leaching from disturbed topsoil samples (0-20 cm) of an Inceptisol, under the influence of sugarcane vinasse. Pb sorption was evaluated by batch sorption method, using air-dried samples (< 2 mm) treated with pure (100%), and diluted (20%, and 50%) vinasse. The amended soil samples were further reacted with 0.05; 0.10; 0.25; 0.50, and 0.75 mmol L-1 of Pb. To measure the Pb leached, soil columns were packed in PVC tubes, 12-cm long with 4-cm internal diameter filled with 200 g of... Tipo: Info:eu-repo/semantics/article Palavras-chave: Sugarcane cultivation; Organometallic complexes; Organic waste; Pb mobility. Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000400011 Heavy metals extractability in a soil amended with sewage sludge Scientia Agricola Marchi,Giuliano; Guilherme,Luiz Roberto Guimarães; Chang,Andrew C.; Nascimento,Clístenes Williams Araújo do. Few investigations have been carried out about the comparison of desorption rate and amount of heavy metals extracted successively by organic acid mixtures mimicking the rhizosphere and routine extractants in sewage sludge-amended soils. Extractions of Zn, Cd, Ni, Cr, and Cu were performed in samples of a sewage sludge-amended soil using seven extractants: four organic acid mixtures and three routine extractants (DTPA, Mehlich-I, and ammonium acetate). Results from single pass extractions, in which the extractable metal contents were determined by simply extracting the soil a single time, as well as from 15 successive extractions, in which the solid residues of the first extraction was successively extracted 14 additional times, of heavy metals were... Tipo: Info:eu-repo/semantics/article Palavras-chave: Oxisol; Extraction rate; Trace elements. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000500009 Modeling and prediction of sulfuric acid digestion analyses data from PXRF spectrometry in tropical soils Scientia Agricola Silva,Sérgio Henrique Godinho; Silva,Elen Alvarenga; Poggere,Giovana Clarice; Pádua Junior,Alceu Linares; Gonçalves,Mariana Gabriele Marcolino; Guilherme,Luiz Roberto Guimarães; Curi,Nilton. ABSTRACT Sulfuric acid digestion analyses (SAD) provide useful information to environmental studies, in terms of the geochemical balance of nutrients, parent material uniformity, nutrient reserves for perennial crops, and mineralogical composition of the soil clay fraction. Yet, these analyses are costly, time consuming, and generate chemical waste. This work aimed at predicting SAD results from portable X-ray fluorescence (pXRF) spectrometry, which is proposed as a “green chemistry” alternative to the current SAD method. Soil samples developed from different parent materials were analyzed for soil texture and SAD, and scanned with pXRF. The SAD results were predicted from pXRF elemental analyses through simple linear regressions, stepwise multiple linear... Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil clay fraction; Weathering indices; Random forest; Proximal sensors; Green chemistry. Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162020000401402 Agronomic and environmental implications of using a By-Product of the Intermediate Tanning Processes as Nitrogen Fertilizer Scientia Agricola Oliveira-Longatti,Silvia Maria de; Cannata,Marcele Gabriel; Ferrazani,Júlia Costa; Carvalho,Teotonio Soares de; Ciavatta,Claudio; Guilherme,Luiz Roberto Guimarães. ABSTRACT Nitrogen (N) is an important nutrient for agriculture, and Brazil is heavily dependent on N imports. A by-product of the intermediate processes of tanning (BPIPT) may be used as an N fertilizer which will reduce this dependency, but its chromium (Cr) content is a matter of concern. This work assessed Cr (III, VI) and N (total, inorganic) contents in four soil samples with contrasting characteristics (especially with respect to their content of manganese (Mn), a potential Cr(III) oxidant), following the addition of the BPIPT. Chemical and microbiological indicators of soil quality were measured to assess the agronomic and environmental implications of the BPIPT addition in Brazilian soils. Our results indicate that the BPIPT is a promising source... Tipo: Info:eu-repo/semantics/article Palavras-chave: High-Mn soils; Agronomic efficiency; Trivalent chromium; Hexavalent chromium; Microbiological parameters. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162017000300250 Teor de arsênio e adsorção competitiva arsênio/fosfato e arsênio/sulfato em solos de Minas Gerais, Brasil Ciência Rural Campos,Mari Lucia; Guilherme,Luiz Roberto Guimarães; Antunes,Alessandra Silveira; Borges,Karine Sousa Carsten. A alta toxicidade de As para homens e animais gera a necessidade de estudos do comportamento químico do arsenato nos solos que possam auxiliar na mitigação de áreas contaminadas com arsênio. Este trabalho teve por objetivo avaliar o teor total e a adsorção de As na ausência e presença dos ânions fosfato e sulfato em seis diferentes classes de solos do estado de Minas Gerais, Brasil. Os solos alvo deste estudo são: o Neossolo Flúvico (RU), Gleissolo Háplico (GX), Gleissolo Melânico (GM), Latossolo Vermelho Distrófico (LVd), coletados em Lavras; Neossolo Quartzarênico (RQ), coletado em Itutinga e o Latossolo Amarelo Distrófico (LAd), coletado em Rosário, no estado de Minas Gerais. As amostras de solo foram secas, moídas e peneiradas em peneira de 2,0mm para... Tipo: Info:eu-repo/semantics/article Palavras-chave: Contaminação química; Elementos-traço; Sorção. Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013000600007 Portable X-ray fluorescence (pXRF) applications in tropical Soil Science Ciência e Agrotecnologia Ribeiro,Bruno Teixeira; Silva,Sérgio Henrique Godinho; Silva,Elen Alvarenga; Guilherme,Luiz Roberto Guimarães. ABSTRACT The X-ray fluorescence (XRF) is an analytical technique for determination of elemental composition of different materials. In soils, the XRF has many pedological, environmental and agronomic applications, mainly after the emergence of portable equipments (pXRF). This technique has been recently adopted and successfully used for soil characterization worldwide, but very rare works have been carried out in soils of developing countries. The soil characterization includes the complete elemental composition determination (nutrients, trace and rare-earth elements) and allows estimating some soil physical and chemical properties. In Brazil, this technique is still incipient, mainly the use of pXRF, however, it can greatly contribute to soil... Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil analyses; Soil morphometrics; Soil characterization. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000300245 Persistência biologica de ametryn, diuron e oxyfluorfen no solo Ciência e Agrotecnologia Peñaherrera-Colina,Luis Antonio; Souza,Itamar Ferreira de; Guilherme,Luiz Roberto Guimarães; Bueno Filho,Júlio Sílvio de Sousa. Realizou-se este trabalho com o objetivo de avaliar a persistência biológica de herbicidas de pré-emergência em condições de casa-de-vegetação utilizando a aveia (Avena sativa L.) como planta teste. O experimento foi instalado na Estação Experimental Boliche, Província de Guayas, Equador entre outubro e dezembro de 2002. O delineamento experimental foi de blocos ao acaso com quatro repetições, em esquema fatorial (3 x 4 x 4 + 1), envolvendo aplicações de três herbicidas (ametryn a 2,0 kg ha-1, diuron a 3,2 kg ha-1 e oxyfluorfen a 0,48 kg ha-1) no solo, mais uma testemunha sem aplicação de herbicida. Após as aplicações este foi amostrado em quatro profundidades (0-5, 5-10, 10-15 e 15-20 cm), em quatro épocas distintas (10, 20, 30 e 40 dias após aplicação).... Tipo: Info:eu-repo/semantics/article Palavras-chave: Lixiviação; Herbicida; Bioensaio. Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542005000500010 Atrazine in a corn cultivated area and its relation with the landscape position Ciência e Agrotecnologia Aquino,Regimeire Freitas; Lima,José Maria de; Magalhães,Ciro Augusto de Souza; Silva,Bruno Montoani; Carvalho,Renato Fráguas de; Guilherme,Luiz Roberto Guimarães. Atrazine is still being used in no-till corn production in Brazil. This herbicide can be moved by overland flow and leached in the soil profile. In both ways, it can pollute water, either by reaching the groundwater or lakes and streams close to the crop field. This study evaluated the presence of atrazine in a dystrophic Yellow-Red Argisol and a dystrophic Melanic Gleisol in a corn field, where atrazine has been applied for 11 years. Overland flow was the main process of atrazine transport on hillslope and leaching was the most important process in the floodplain. Frequency and location of atrazine application in the landscape define this herbicide contamination process. Tipo: Info:eu-repo/semantics/article Palavras-chave: Herbicide; Overland flow; Maize. Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542013000500001 Soil management and ionic strength on selenite retention in oxidic soils Ciência e Agrotecnologia Araujo,Anderson Mendes; Lessa,Josimar Henrique de Lima; Ferreira,Liniker André; Guilherme,Luiz Roberto Guimarães; Lopes,Guilherme. ABSTRACT Sorption of selenium (Se) on soils may be influenced by factors that are changed though agricultural practices usually performed for crop production, such as soil pH, competing anion and organic matter contents, among others. This study aimed to evaluate the influence of soil management and ionic strength (IS) on Se retention in Brazilian soils, which is important to predict Se availability in both systems, native and cultivated soils. For that, adsorption and desorption reactions of Se were evaluated in 16 soil samples (eight from cultivated soils and eight from native soils), using solutions containing 100 and 500 µg L-1 Se in the form of sodium selenate and in two IS, 15 and 150 mM. Se adsorption varied as a function of IS for most soils, which... Tipo: Info:eu-repo/semantics/article Palavras-chave: Adsorption/desorption reactions; Brazilian soils; Competitive anion; Soil cultivation; Retention/mobility.. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542018000400395 Selenium behavior in the soil environment and its implication for human health Ciência e Agrotecnologia Lopes,Guilherme; Ávila,Fabrício William; Guilherme,Luiz Roberto Guimarães. ABSTRACT Selenium (Se) is an important element that was discovered in 1817, and since the 1960s, it has been regarded as an essential micronutrient for both animals and humans, playing among other functions a relevant role in the antioxidant system of mammals. Inadequate blood Se levels in the human body is a well-known concern in many parts of the world. This malnutrition problem is often due to Se-poor diet, probably as a result of the low Se availability in soils where crops are growing. Nowadays, it is known that not only the total content, but also the inorganic and organic forms of Se contained in foods are important for human nutrition. However, paradoxically some regions of the world present high Se levels in soils causing several functional... Tipo: Info:eu-repo/semantics/article Palavras-chave: Essential micronutrient; Se adsorption; Se availability; Biofortification; Human nutrition.. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000600605 Elemental concentration via portable x-ray fluorescence spectrometry: Assessing the impact of water content Ciência e Agrotecnologia Santana,Monna Lysa Teixeira; Carvalho,Geila Santos; Guilherme,Luiz Roberto Guimarães; Curi,Nilton; Ribeiro,Bruno Teixeira. ABSTRACT Portable X-ray fluorescence (pXRF) analysis can be considered one of the main recent advances for chemical characterization of earth materials. The water content of the samples can affect the pXRF performance. As a novelty, we aimed to establish relationships (linear regression) between the effect of water content on pXRF results and atomic number (Z) of the elements. Three certified reference materials (CRM) were investigated: OREAS 100a, OREAS 101a, and OREAS 101b. These materials were saturated (0.68 g g-1) with distilled water and left to air-dry naturally. During the drying, the elemental concentrations (C) were determined at different water contents using a pXRF spectrometer. For each water content, the ratio Cwet/Cdry was determined and... Tipo: Info:eu-repo/semantics/article Palavras-chave: Proximal sensors; X-ray scattering; Spectroscopy analysis.. Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542019000100205 Portable X-ray fluorescence (pXRF) spectrometry applied to the prediction of chemical attributes in Inceptisols under different land uses Ciência e Agrotecnologia Teixeira,Anita Fernanda dos Santos; Weindorf,David C.; Silva,Sérgio Henrique Godinho; Guilherme,Luiz Roberto Guimarães; Curi,Nilton. ABSTRACT Portable X-ray fluorescence (pXRF) spectrometry has been increasingly adopted for varying studies worldwide. This work aimed at characterizing effects of soil management on the content of chemical elements detected by pXRF in managed and unmanaged areas of Inceptisols, and evaluating the potential of using pXRF data to generate prediction models for soil fertility attributes, evaluating the effect of land uses on such models. Samples were collected in A, B, and C horizons of soils under native forest, native Cerrado, coffee crops with 1 and 5 years of implantation and eucalyptus. Soil fertility attributes were determined through laboratory analyses, whereas, elemental contents were obtained through pXRF analysis. PXRF data were used for modeling... Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil property modeling; Soil management; Soil fertility; Brazilian Cerrado; Proximal sensor.. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542018000500501 Multiple linear regression and random forest to predict and map soil properties using data from portable X-ray fluorescence spectrometer (pXRF) Ciência e Agrotecnologia Silva,Sérgio Henrique Godinho; Teixeira,Anita Fernanda dos Santos; Menezes,Michele Duarte de; Guilherme,Luiz Roberto Guimarães; Moreira,Fatima Maria de Souza; Curi,Nilton. ABSTRACT Determination of soil properties ​​helps in the correct management of soil fertility. The portable X-ray fluorescence spectrometer (pXRF) has been recently adopted to determine total chemical element contents in soils, allowing soil property inferences. However, these studies are still scarce in Brazil and other countries. The objectives of this work were to predict soil properties using pXRF data, comparing stepwise multiple linear regression (SMLR) and random forest (RF) methods, as well as mapping and validating soil properties. 120 soil samples were collected at three depths and submitted to laboratory analyses. pXRF was used in the samples and total element contents were determined. From pXRF data, SMLR and RF were used to predict soil... Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil analyses; Spatial prediction; Proximal sensor.. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000600648 Registros recuperados: 47 Primeira ... 1 2 3 ... Última

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