SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

CARDOSO, F. B. da F.; MARTINS, E. de S.; CARVALHO, J. C. de.

Resumo: Este trabalho mostra a aplicação de técnicas modernas de micromorfologia e mineralogia no desenvolvimento de um modelo evolutivo do colapso em solos tropicais profundamento intemperizados. Abstract: This work exibition the application of modern techniques of micromorphology and mineralogy in the development of an evolutionary model of the collapse in deeply weathering tropical soils.

Tipo: Folhetos

Palavras-chave: ECOSOL170; Micromorfologia; Colapso; Micromorphology; Collapse; Soil testing; Análise do Solo; Cerrado; Geoquímica; Mineralogia; Solo; Geochemistry; Mineralogy; Soil.

Ano: 2002

URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567945

Bohemian mineralogy in the early 19th century: the Vaterländisches Museum in Böhmen

Naturalis

Schweizer, C.R..

The Vaterländisches Museum in Prague was officially founded in 1822 by Caspar and Franz Sternberg as a manifestation of Bohemian nationalism. It aimed at 1) the education of the public, 2) the sponsorship of Bohemian scientific and cultural research, and 3) the economical utilization of scientific knowledge. Under these aspects also the development of the oryctognostic collection of the museum should be regarded. In 1818, private mineral collections were donated. After its official opening in 1822, the united collections were split into two parts, a systematic and a local native collection. The first was basically distinguished by a prominent sortiment of gems, particularly by the typical garnet species and varieties, furthermore by the meteorites of...

Tipo: Article / Letter to the editor

Palavras-chave: 19th century; Bohemia; Museum; Collections; Research; Mineralogy; 38.30.

Ano: 2004

URL: http://www.repository.naturalis.nl/record/215469

Caracterização física e aspectos geoquímicos de dois solos da Península Keller, Ilha Rei George, Antártica Marítima.

ALBUQUERQUE FILHO, M. R.; SCHAEFER, C. E. G. R.; SIMAS, F. B. N.; PEREIRA, V. V.; GUERRA, M. B. B..

Tipo: Folders

Palavras-chave: Soil testing; Análise do Solo; Geoquímica; Mineralogia; Solo; Geochemistry; Mineralogy; Soil.

Ano: 2005

URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/569491

Carbon sequestration in clay and silt fractions of Brazilian soils under conventional and no-tillage systems

Scientia Agricola

Reis,Cecília Estima Sacramento dos; Dick,Deborah Pinheiro; Caldas,Jennifer da Silva; Bayer,Cimélio.

The capacity of soils to sequestrate carbon (C) is mainly related to the formation of organo-mineral complexes. In this study, we investigated the influence of soil management systems on the C retention capacity of soil with an emphasis on the silt and clay fractions of two subtropical soils with different mineralogy and climate. Samples from a Humic Hapludox and a Rhodic Hapludox, clayey soils cultivated for approximately 30 years under no-tillage (NT) and conventional tillage (CT) were collected from six layers distributed within 100-cm soil depth from each site and from an adjacent native forest. After the removal of particulate organic matter (POM), the suspension (<53 µm) was sonicated, the silt and clay fractions were separated in accordance with...

Contribution of non-exchangeable potassium forms and its accumulation in corn plants

Palavras-chave: Carbon saturation; Mineralogy; Physical fractionation; Soil organic matter; Soil profile.

Ano: 2014

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162014000400006

AGRIAMBI

Vieira,Montesquieu da S.; Oliveira,Fábio H. T. de; Santos,Hemmannuella C.; Medeiros,Jailma dos S. de.

ABSTRACT The state of Paraíba, Brazil, has soils from well- to poorly-developed, in which potassium (K) is found in different levels, forms and, consequently, with varying availability to plants. The objective of this study was to evaluate the contribution of non-exchangeable K forms to corn plants in 12 soils from Paraíba state, along four successive cycles. The experimental design was completely randomized block with three replicates and the 24 treatments consisted of the combination between two K levels (0 and 100 mg dm-3) and 12 soils. Before and after each cycle, subsamples of 0.2 dm3 were collected in each pot for the determination of non-exchangeable K (Kne), exchangeable K (Ke) and soluble K (Ks). For each cycle, dry matter production, dry matter...

Essai d'interprétation de la dynamique sédimentaire par l'analyse granulométrique et minéralogique au large du golfe de Gabès

Palavras-chave: Northeastern soils; Mineralogy; K forms; K availability.

Ano: 2016

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000100009

Estimation of water retention and availability in soils of Rio Grande do Sul

Brahim, M.; Ben Amor, R.; Gueddari, M..

The results of the grain size and mineralogical analysis of the surface sediments of the Gulf of Gabes, taken with Various depths between the coast Sfax-Zarzis and the isobaths -100 m, allow to identify the origin of these sediments and to specify the factors and the phenomena, which are involved in their transport and their deposit. The mineralogical study resulted in high lighting a clear relation between the recent sedimentary stock of the gulf of Gabès and the bordering geological formations. The sediments study showed that the detritus materials are of continental origin and the sediments coming from the coastal erosion are subjected to a dynamics, which is controlled, primarily by the action of the currents (current coastal and currents tide and by...

Tipo: Journal Contribution

Palavras-chave: Grain size; Sediment analysis; Sediment chemistry; Sediments; Mineralogy.

Ano: 2003

URL: http://hdl.handle.net/1834/1118

Rev. Bras. Ciênc. Solo

Reichert,José Miguel; Albuquerque,Jackson Adriano; Kaiser,Douglas Rodrigo; Reinert,Dalvan José; Urach,Felipe Lavarda; Carlesso,Reimar.

Dispersed information on water retention and availability in soils may be compiled in databases to generate pedotransfer functions. The objectives of this study were: to generate pedotransfer functions to estimate soil water retention based on easily measurable soil properties; to evaluate the efficiency of existing pedotransfer functions for different geographical regions for the estimation of water retention in soils of Rio Grande do Sul (RS); and to estimate plant-available water capacity based on soil particle-size distribution. Two databases were set up for soil properties, including water retention: one based on literature data (725 entries) and the other with soil data from an irrigation scheduling and management system (239 entries). From the...

Estudio sedimentológico y mineralógico de la plataforma continental ecuatoriana en el tramo comprendido entre Salinas y Ayampe

Palavras-chave: Pedotransfer functions; Texture class; Water retention curve; Mineralogy.

Ano: 2009

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832009000600004

Estudio sedimentológico y mineralógico en Bahía Chile, Isla Greenwich, Islas Shetland del Sur (Antártida)

Soledispa, B.; Villacres, J..

Esta investigación tiene como principal objetivo conocer como están distribuidos los sedimentos en el área, su origen, procedencia y su comportamiento en relación a los agentes de transporte y sedimentación que allí actúan.

Tipo: Journal Contribution

Palavras-chave: Sedimentology; Mineralogy; Distribution; Sediment analysis; Mineralogy; Distribution; Http://aims.fao.org/aos/agrovoc/c_4856; Http://aims.fao.org/aos/agrovoc/c_35773.

Ano: 1989

URL: http://hdl.handle.net/1834/2158

Geology, petrography and geochemistry of the A-type granites from the Morro Redondo Complex (PR-SC), southern Brazil, Graciosa Province

Villacrés, J.; Goyes A., P..

En este trabajo se presentan los resultados de los análisis realizados sobre los sedimentos superficiales de fondo en Bahía Chile, Isla Greenwich, desde el punto de vista granulométrico y mineralógico. En un total de 18 muestras del área se observa una predominancia de limos muy mal seleccionados, platicúrticos y con asimetría hacia los tamaños finos. Mineralógicamente, se observa mayor concentración de minerales livianos sobre los pesados, con altos porcentajes de fragmentos de rocas igneas, deduciéndose que son sedimentos inmaduros y que el área fuente se encuentra en una zona cercana. Los sedimentos depositados en la bahía son de orígen mixto: Procedentes de la erosión de las formaciones costeras y en menor porcentaje, del aporte de organismos marinos....

Tipo: Journal Contribution

Palavras-chave: Granulometry; Mineralogy; Sediment mixing; Heavy minerals; Igneous rocks; Light minerals; Mineralogy.

Ano: 1993

URL: http://hdl.handle.net/1834/3770

Anais da ABC (AABC)

VILALVA,FREDERICO C.J.; VLACH,SILVIO R.F..

The Morro Redondo Complex is one of the most important occurrences of the Graciosa A-type Province, southern Brazil. It consists of the Papanduva and Quiriri granitic plutons and a contemporaneous bimodal volcanic association. The Papanduva Pluton includes massive and deformed peralkaline alkali-feldspar granites with Na-Ca and Na-amphiboles and clinopyroxenes. The deformed types are the most evolved rocks in the province and carry rare ‘agpaitic’ minerals, some being described for the first time in granites from Brazil. The larger Quiriri Pluton comprises massive, slightly peraluminous, biotite syeno- and monzogranites with rare Ca-amphibole. Biotite compositions are relatively homogeneous, whereas sodic amphiboles and clinopyroxenes show increasing Na...

Guia de campo da XII Reunião Brasileira de Classificação e Correlação de Solos: RCC de Rondônia.

Palavras-chave: A-type granites; Geochemistry; Petrography; Graciosa Province; Mineralogy; Morro Redondo Complex.

Ano: 2014

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000100085

Impact des émissaires et canalisation sur l'environnement de la baie de Tanger ( Maroc ) : Approche géochimique

A XII Reunião Brasileira de Classificação e Correlação de Solos e o resgate histórico das RCCs. Uma breve contextualização sobre a ocupação e colonização do estado de Rondônia. Geologia do estado de Rondônia. Análise integrada das paisagens do estado de Rondônia. Vegetação do estado de Rondônia. Solos da XII Reunião Brasileira de Classificação e Correlação de Solos: RCC de Rondônia. Mineralogia da fração argila dos solos da XII Reunião Brasileira de Classificação e Correlação de Solos - estado de Rondônia. Micromorfologia dos perfis da XII RCC. A susceptibilidade magnética e a condutividade elétrica aparente em amostras de solos da XII Reunião Brasileira de Classificação e Correlação de Solos - RCC de Rondônia. Atributos químicos e granulometria dos solos...

Tipo: Livros

Palavras-chave: Classificação do Solo; Gênese do Solo; Geologia; Geomorfologia; Mineralogia; Aptidão Agrícola; Soil classification; Soil formation; Geology; Geomorphology; Mineralogy; Land suitability.

Ano: 2019

URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1112765

INTERNAL STRUCTURE OF A VERMICULAR IRONSTONE AS DETERMINED BY X-RAY COMPUTED TOMOGRAPHY SCANNING

Achab, M.; El hatimi, I.; El moumni, B..

Dans le but d’évaluer le degré de contamination chimique et/ou organique des sédiments superficiels le long des émissaires continentaux, des échantillons de sédiments de surface ont été prélevés et analysés le long des oueds Souani et Mghogha et au niveau de la canalisation majeure de la ville de Tanger débouchant sur la baie située sur la marge méditerranéenne marocaine. La dynamique sédimentaire dans les oueds montre exceptionnellement une évolution amont–aval granocroissante en relation avec l’activité anthropique (remblaiement des bassins versants par les matériaux de construction tels que les briques, ciments, verres, etc.). La matière organique est présente à des teneurs relativement élevées en corrélation positive avec la sédimentation fine. L’azote...

Tipo: Journal Contribution

Palavras-chave: Sedimentology; Mineralogy; Pollution; Geochemical surveys; Bay dynamics.

Ano: 2002

URL: http://hdl.handle.net/1834/199

Rev. Bras. Ciênc. Solo

Zinn,Yuri Lopes; Carducci,Carla Eloize; Araujo,Marla Alessandra.

Ironstones or petroplinthites are common materials in soils under humid tropical climate, generally defined as the result of Fe oxide accumulation in areas where the water table oscillates, and may exhibit considerable morphological variability. The aim of this study was to examine the internal structure and porosity of an ironstone fragment from a Petroferric Acrudox in Minas Gerais, Brazil, by computed tomography (CT) and conventional techniques. The sample analyzed had total porosity of 59.5 %, with large macropores in the form of tubular channels and irregular vughs, the latter with variable degrees of infilling by material released from the ironstone walls or the soil matrix. The CT scan also showed that the ironstone has wide variation in the density...

Manual de métodos de análise de solo.

Palavras-chave: Laterite; Soils with plinthite; Density; Mineralogy.

Ano: 2015

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000200345

Manual de métodos de análise de solo.

Análises físicas; Análises químicas; Análises da matéria orgânica; Análises mineralógicas; Análises micromorfológicas.

Tipo: Livros

Palavras-chave: Análise micromorfológica; Análise do solo; Física do solo; Química do solo; Matéria orgânica; Mineralogia; Soil analysis; Soil physics; Soil chemistry; Soil organic matter; Mineralogy; Soil micromorphology.

Ano: 2017

URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1085209

Método integrado de caracterização mineralógica de solos profundamente intemperizados.

Analises fisicas; Preparo da amostra; Terra fina, cascalho e calhaus;Umidade atual; Umidade residual e fator "f"; Umidade obtida no aparelho extrator de Richards; Umidade obtida com a mesa de tensao; Densidade aparente; Porosidade total; Microporosidade (Metodo Mesa de Tensao); Macroporosidade; Analise granulometrica (Dispersao Total); Argila dispersa em agua; Grau de floculacao; Relacao silte/argila; Condutividade hidraulica; Percentagem de saturacao; Percentagem de agregados; Limite de liquidez; Limite e indice de plasticidade; Limite de pegajosidade; Limite de contracao (LC) (Metodo do Mercurio Metalico); Grau de contracao (GC); Superficie especifica (Metodo Simplificado); Separacao de argila e silte para analises de raios X; Coeficiente de...

Tipo: Livros

Palavras-chave: Solo; Física do solo; Química do solo; Análise do solo; Mineralogia; Soil chemistry; Soil analysis; Mineralogy; Soil; Soil physics.

Ano: 1997

URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/330804

Mineralogia, estrutura e comportamento físico-hídrico de Latossolos brasileiros e comparação com solos de regiões temperadas.

MARTINS, E. de S..

Tipo: Folhetos

Palavras-chave: Intemperismo; Metodologia; Methods; Cerrado; Mineralogia; Solo; Mineralogy; Soil; Weathering.

Ano: 2000

URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/558084

Mineralogical and geochemical influences on sediment color of Amazon wetlands analyzed by visible spectrophotometry

OTTONI, M. V.; SOUZA, L. R.; BARBOSA, S. M.; ANDRADE, R.; TEIXEIRA, W. G.; INDA, A. V.; CURI, N..

The association between the mineralogy of the clay fraction, the structure and the physico-hydraulic behavior of the Brazilian Latosols (Oxisols) is addressed here in a global, simple, objective, and instructive context. The simplicity of the mineralogical composition of the clay fraction of Latosols facilitates the understanding of cause and effect relationships in this context. Higher kaolinite contents favor the manifestation of the blocky structure, resulting in higher bulk density values, lower water infiltration rates, and lower potential aquifer recharge. Conversely, higher levels of gibbsite and Fe-oxide minerals (mainly hematite and goethite), in this order, favor the small granular structure of high stability in the subsurface horizon (B) of the...

Tipo: Folhetos

Palavras-chave: Solos Temperados; Mineralogia; Estrutura do Solo; Oxisol; Soil structure; Mineralogy; Oxisols; Temperate soils.

Ano: 2024

URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1163287

Acta Amazonica

Guimarães,José Tasso Felix; Cohen,Marcelo Cancela Lisboa; França,Marlon Carlos; Silva,Any Kelly Terra da; Rodrigues,Suyanne Flavia Santos.

Based on sedimentological and geochemical data, this work relates spectrophotometric measurements with sediment composition and its application in palaeoecological studies of Amazon wetlands. The CIELAB values are directly related to mineralogical and chemical composition, mostly involving quartz, iron oxyhydroxides and sulfides (e.g. pyrite), and total organic carbon. Total organic carbon contents between 0.4-1%, 1-2%, 3-5% and 15-40% were related to L* (lightness) data of 27, 26-15, 7-10 and 7 or less, respectively. The CIELAB values of a deposit in Marabá, Pará, were proportional to variations in quartz and total organic carbon contents, but changes in zones of similar color, mainly in the +a* (red) and +b* (yellow) values of deposits in Calçoene, Amapá...