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Comparison of Polycyclic Aromatic Hydrocarbon (PAHs) concentrations in urban and natural forest soils in the Atlantic Forest (São Paulo State)

BOUROTTE, Christine; FORTI, Maria Cristina; LUCAS, Yves; MELFI, Adolpho J.
Fonte: Academia Brasileira de Ciências Publicador: Academia Brasileira de Ciências
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
35.9%
Studies about pollution by Polycyclic Aromatic Hydrocarbons (PAHs) in tropical soils and Brazil are scarce. A study was performed to examine the PAHs composition, concentrations and sources in red-yellow Oxisols of remnant Atlantic Forest of the São Paulo State. Sampling areas were located in an urban site (PEFI) and in a natural one (CUNHA).The granulometric composition, pH, organic matter content and mineralogical composition were determined in samples of superficial soils. The sum of PAHs (ΣHPAs) was 4.5 times higher in the urban area than in the natural one. Acenaphthylene, acenaphthene, fluorene, phenanthrene and fluoranthene have been detected in the soils of both areas and presented similar concentrations. Acenaphthene and fluorene were the most abundant compounds. Pyrene was twice more abundant in the soils of natural area (15 µg.kg-1) than of the urban area and fluoranthene was the dominant compound (203 µg.kg-1) in urban area (6.8 times higher than in the natural area). Some compounds of higher molecular weight, which are tracers of vehicular emissions showed significant concentrations in urban soils. Pyrene represented 79% of ΣPAHs whereas it has not been detected in natural soils. The results showed that forest soils in urban area are characterized by the accumulation of high molecular weight compounds of industrial and vehicular origin.; Estudos sobre a poluição por Hidrocarbonetos Policíclicos Aromáticos (HPAs) são escassos em solos tropicais e no Brasil. Um estudo foi realizado para examinar a composição...

Geochemistry of iron and manganese in soils and sediments of a mangrove system, Island of Pai Matos (Cananeia - SP, Brazil)

OTERO, X. L.; FERREIRA, T. O.; HUERTA-DIAZ, M. A.; Partiti, Carmen Silvia de Moya; SOUZA JR., V.; Torrado, Pablo Vidal; MACIAS, F.
Fonte: ELSEVIER SCIENCE BV Publicador: ELSEVIER SCIENCE BV
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
35.92%
Five zones along a transect of 180 m were selected for study on the Island of Pai Matos (Sao Paulo, Brazil). Four of the zones are colonised by vascular plants (Spartina SP, Laguncularia LG, Avicennia AV and Rhizophora RH) and were denominated soils, and the other zone, which lacks vegetation, was denominated sediment (SD). The geochemical conditions differed significantly in soils and sediment and also at different depths. The soils were oxic (Eh > 350 mV) or suboxic (Eh: 350-100 mV) at the surface and anoxic (Eh < 100 mV) at depth, whereas in the sediment anoxic conditions prevailed at all depths, but with a lower concentration of sulphides in the pore water and pyrite in the solid fraction. Under these geochemical conditions Fe is retained in the soils, while the Mn tends to be mobilized and lost. The most abundant form of iron oxyhydroxide was lepidocrocite (mean concentration for all sites and depths, 45 +/- 19 mu mol g(-1)), followed by goethite (30 19 mu mol g(-1))and ferrihydrite (19 +/- 11 mu mol g(-1)),with significant differences among the mean concentrations. There was a significant decrease with depth in all the types of Fe oxyhydroxides measured, particularly the poorly crystalline forms. The pyrite fraction was an important component of the free Fe pool (non-silicate Fe) in all soils as well as in the sediment...

Valores de referência de metais pesados em solos de Mato Grosso e Rondônia; Reference Values for heavy metals in soils from Mato Grosso and Rondônia states, Brazil

Santos, Sabrina Novaes dos
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 10/06/2011 PT
Relevância na Pesquisa
35.93%
Os órgãos de monitoramento ambiental necessitam de indicadores de referência para a avaliação continuada dos impactos ambientais. Indicadores são obtidos por meio da comparação dos teores totais de elementos tóxicos de um solo com valores determinados em condições naturais (não poluídos) ou com valores de referência. No Brasil, com a crescente demanda social pela melhoria e manutenção da qualidade ambiental, alguns estudos foram realizados com o objetivo de estabelecer valores orientadores para metais pesados em solos. Estes são valores préestabelecidos quanto à presença de substâncias químicas que possibilitam a verificação de possível contaminação. A legislação brasileira estabelece três valores orientadores: Valores de Referência de Qualidade (VRQs), de Prevenção (VP) e de Investigação (VI). O VRQ indica o limite de qualidade para um solo considerado limpo a ser utilizado em ações de prevenção da poluição do solo e no controle de áreas contaminadas. Foram coletadas amostras de solo dos estados de Mato Grosso e Rondônia, nas profundidades de 0-5, 5-10, 10-20 e 20-30 cm, em áreas de vegetação nativa (sem ou mínima intervenção antrópica). Objetivou-se com essa dissertação: (i) determinar os valores de referência de metais pesados em solos de Mato Grosso e Rondônia; (ii) avaliar métodos de extração de teores pseudototais de metais pesados (EPA 3051 e Água Régia); (iii) correlacionar estes valores com atributos físicos e químicos dos solos; (iv) correlacionar os resultados desse estudo com valores já estabelecidos para solos de outros estados brasileiros. Partiu-se das hipóteses: i) não ocorrerão diferenças entre os teores naturais de metais pesados nos solos de Mato Grosso e Rondônia pelos dois métodos de extração de teores pseudototais de metais; ii) os VRQ de metais pesados para os solos de Mato Grosso e Rondônia são diferentes dos VRQ obtidos para solos de outros estados brasileiros; e iii) haverá correlação significativa entre os teores naturais de metais pesados e os atributos físicos e químicos dos solos. Houve diferença entre os métodos da água régia e EPA 3051 para recuperação dos metais Co...

Grau de saturação de fósforo em solos tropicais altamente intemperizados; Degree of phosphorus saturation in highly weathered tropical soils

Campos, Murilo de
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 28/08/2014 PT
Relevância na Pesquisa
35.93%
O fósforo (P) é um elemento essencial para o desenvolvimento das plantas e precisa ser suprido em quantidades adequadas para obtenção de altas produtividades das culturas agrícolas. O conteúdo de P no solo e consequente perda deste para as águas superficiais são importantes fatores relacionados a eutrofização de ambientes aquáticos. Nesse trabalho foi obtido o Grau de saturação de P (GSP) em 29 solos tropicais altamente intemperizados e seus valores foram correlacionados com atributos químicos, físicos e mineralógicos dos solos. Antes de calcular o GSP, foram determinados parâmetros como Índice de sorção de P (ISP), Capacidade de sorção de P (CSP) e fator de escala ?. Os solos foram divididos em grupos, e os solos de cada grupo receberam doses diferenciadas de P para obtenção do ISP devido a variação na capacidade de adsorção,. As doses utilizadas foram 200, 500, 1000, 1500 e 3000 mg L-1 de P. Os períodos de reação avaliados foram 1, 3, 7, 21, 42, e 84 d. A porcentagem média de P adsorvida no final do período de contato (84 d) variou de 23% a 49% do P adicionado inicialmente. Os Latossolos, os Gleissolos e os Nitossolos apresentaram os maiores valores de ISP, enquanto os Argissolos e os Neossolos tiveram os menores valores. Os maiores valores foram encontrados nos solos com elevados teores de argila...

Routine and advanced analysis of mechanical in situ tests : results on saprolitic soils from granites more or less mixed in Portugal

Correia, A. Gomes; Fonseca, António Viana da; Gambin, Michel
Fonte: Millpress Publicador: Millpress
Tipo: Conferência ou Objeto de Conferência
Publicado em //2004 ENG
Relevância na Pesquisa
35.9%
This paper covers the more recent findings in the interpretation of different in-situ tests, such as SPT, CPT, PMT, SBPT, DMT and PLT to obtain geotechnical parameters of significant use in engineering practice. It concerns mainly shearing resistance properties and stiffness properties with special emphasis on the importance of stress and strain dependency. In this context some practical rules are presented for using parameters at two levels of design: routine and advanced levels. These practical rules concern transported soils (unaged and uncemented) are compared with those established in this paper for residual saprolitic soils from granite from different regions of Portugal. lt was noticed that the bonded structure and fabric of residual saprolitic soils from granite have a significant influence on their geomechanical behaviour. Consequently, the structural peculiarities of these residual soils influence the pattern of their non-linear constitutive behaviour. Deformability modulus derived from robust but relatively crude tests, such as SPT, CPT, DPT or even PMT, are compared with reference values taken from seismic survey (CH) and load tests, such as PLT. They can be situated on stress-strain levels defined from laboratory triaxial tests over high quality undisturbed samples. Several parametric correlations were established...

Use of pedological maps in the identification of sensitivity of soils to acidic deposition: application to Brazilian soils

Melfi,Adolpho J.; Montes,Celia R.; Carvalho,Adilson; Forti,Maria Cristina
Fonte: Academia Brasileira de Ciências Publicador: Academia Brasileira de Ciências
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/03/2004 EN
Relevância na Pesquisa
35.9%
The pedogeochemical maps present the spatial distribution of soils according to crystalochemical parameters (clay fraction) and physic-chemical aspects of the sorting complex (CEC and BS). These maps are adequate tool for environmental studies and particularly, for the analysis of the terrestrial ecosystem sensibility to acidic deposition. The pedogeochemical maps of the Brazilian soils, elaborated using FAO SoilWorld Map, allowed establishing the soil distribution according to 5 classes of vulnerability to acidic deposition, as defined by Stockholm Environmental Institute (SEI). From these maps, it is observed that about 50% of the Brazilian soils are high vulnerable to acidic deposition and can be included within the most sensitive class. This group is formed by well-developed and mature soils, constituted by clay minerals of kaolinite type associated with variable amount of gibbsite. About 8% of the soils can be considered as the least sensitive class. They correspond to Topomorphic Vertisols (Vertissolo, Embrapa 1999), Planosols (Planossolo, Embrapa 1999) and saline soils. Finally, the remaining soils represent the balanced media that dominate the northeastern semiarid zones and the south and northeastern subtropical zones.

Comparison of Polycyclic Aromatic Hydrocarbon (PAHs) concentrations in urban and natural forest soils in the Atlantic Forest (São Paulo State)

Bourotte,Christine; Forti,Maria Cristina; Lucas,Yves; Melfi,Adolpho J.
Fonte: Academia Brasileira de Ciências Publicador: Academia Brasileira de Ciências
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/03/2009 EN
Relevância na Pesquisa
35.9%
Studies about pollution by Polycyclic Aromatic Hydrocarbons (PAHs) in tropical soils and Brazil are scarce. A study was performed to examine the PAHs composition, concentrations and sources in red-yellow Oxisols of remnant Atlantic Forest of the São Paulo State. Sampling areas were located in an urban site (PEFI) and in a natural one (CUNHA).The granulometric composition, pH, organic matter content and mineralogical composition were determined in samples of superficial soils. The sum of PAHs (ΣHPAs) was 4.5 times higher in the urban area than in the natural one. Acenaphthylene, acenaphthene, fluorene, phenanthrene and fluoranthene have been detected in the soils of both areas and presented similar concentrations. Acenaphthene and fluorene were the most abundant compounds. Pyrene was twice more abundant in the soils of natural area (15 µg.kg-1) than of the urban area and fluoranthene was the dominant compound (203 µg.kg-1) in urban area (6.8 times higher than in the natural area). Some compounds of higher molecular weight, which are tracers of vehicular emissions showed significant concentrations in urban soils. Pyrene represented 79% of ΣPAHs whereas it has not been detected in natural soils. The results showed that forest soils in urban area are characterized by the accumulation of high molecular weight compounds of industrial and vehicular origin.

Growth, phosphorus uptake, and rhizosphere microbial-community composition of a phosphorus-efficient wheat cultivar in soils differing in pH

Marschner, P.; Solaiman, M.; Rengel, Z.
Fonte: Wiley-V C H Verlag GMBH Publicador: Wiley-V C H Verlag GMBH
Tipo: Artigo de Revista Científica
Publicado em //2005 EN
Relevância na Pesquisa
35.94%
In a pot experiment, the P-efficient wheat (Triticum aestivum L.) cultivar Goldmark was grown in ten soils from South Australia covering a wide range of pH (four acidic, two neutral, and four alkaline soils) with low to moderate P availability. Phosphorus (100 mg P kg-1) was supplied as FePO4 to acidic soils, CaHPO4 to alkaline, and 1:1 mixture of FePO4 and CaHPO4 to neutral soils. Phosphorus uptake was correlated with P availability measured by anion-exchange resin and microbial biomass P in the rhizosphere. Growth and P uptake were best in the neutral soils, lower in the acidic, and poorest in the alkaline soils. The good growth in the neutral soils could be explained by a combination of extensive soil exploitation by the roots and high phosphatase activity in the rhizosphere, indicating microbial facilitation of organic-P mineralization. The plant effect (soil exploitation by roots) appeared to dominate in the acidic soils. Alkaline phosphatase and diesterase activities in acidic soils were lower than in neutral soils, but strongly increased in the rhizosphere compared with the bulk soil, suggesting that microorganisms contribute to P uptake in these acidic soils. Shoot and root growth and P uptake per unit root length were lowest in the alkaline soils. Despite high alkaline phosphatase and diesterase activities in the alkaline soils...

New micronutrient fertilisers for alkaline soils.

Stacey, Samuel Peter
Fonte: Universidade de Adelaide Publicador: Universidade de Adelaide
Tipo: Tese de Doutorado
Publicado em //2007
Relevância na Pesquisa
35.9%
Trace element deficiencies represent an ongoing limitation to agricultural productivity in Southern Australia and in many regions of the world. Trace element deficiencies are commonly encountered on alkaline and calcareous soils due to their high metal adsorption and fixation capacities. Chelating agents, such as EDTA, have been used to reduce fertiliser fixation in these soils and increase trace element transport to the rhizosphere. However, EDTA, which is the most commonly used chelating agent, can be relatively ineffective on alkaline soils and may have negative environmental implications due to its long-term persistence. This study has identified two novel sequestering agents for use on alkaline and calcareous soils. The novel products differ significantly from EDTA in terms of their structure and functionality. For example, rhamnolipid is synthesised by Pseudomonas bacteria, is nontoxic, biodegradable and forms a lipophilic complex with cationic metal ions. The other chelating agent, polyethylenimine (PEl) can complex up to 4 times more metal (g Cu(II)/g ligand) than EDTA, which has important implications for chelate application rates and the cost effectiveness of chelate use. In solution culture experiments, rhamnolipid and PEl facilitated Zn absorption into the root symplast; the kinetic rate of Zn absorption was greater than that of ZnC12 alone. On alkaline and calcareous soils the novel products were significantly (P O.05) more effective Zn sources than EDTA or the SO24-salt. EDTA increased the concentration of Zn in soil solution. However...

Chemistry, phytotoxicity and remediation of alkaline soils.

Brautigan, David
Fonte: Universidade de Adelaide Publicador: Universidade de Adelaide
Tipo: Tese de Doutorado
Publicado em //2011
Relevância na Pesquisa
35.93%
Highly alkaline soils are known to adversely affect agricultural crop productivity. Problems commonly attributed to such soils include poor structure and nutrient deficiency. Research based on solution cultures suggests that aluminium phytotoxicity may also occur at alkaline pH, however little research has been done in actual soils under controlled conditions. This new constraint needs to be verified and the nature of the aluminium responsible determined. A potential method of remediating alkaline soils is to use acid to lower soil pH to a more neutral value. This requires an understanding of the role of carbonates in causing and maintaining high pH. Whereas the acid buffing intensity of soils has been well documented, comparatively little work has been carried out on alkaline buffering intensity. While research has been carried out on soil treatments that may be used to lower soil pH, a systematic comparison of their relative effectiveness is needed. This study has shown that aluminium is indeed phytotoxic at high pH, significantly reducing the stem and root development of field pea test plants over and above that caused by alkalinity alone. The effects of both alkalinity in general and aluminium in particular became noticeable at a pH of 9.0 and debilitating at a pH of 9.2 or higher. As the quantity of aluminium found in test plants at neutral and high pH was similar...

Plant ecology of part of the Mt. Lofty Ranges and a reconnaissance survey of the soils and vegetation of the hundreds of Tatiara, Wirrega and Stirling of county Buckingham.

Specht, R. L.
Fonte: Universidade de Adelaide Publicador: Universidade de Adelaide
Tipo: Tese de Doutorado
Publicado em //1949
Relevância na Pesquisa
35.9%
This paper deals with the ecology of that part of the Mount Lofty Ranges between the Torrens Gorge in the north and Noarlunga in the south. The area surveyed by Specht lies between the Torrens Gorge in the north, grid line 80 of the Adelaide and Echunga ordnance map in the east and grid line 68 in the south, while Perry surveyed the area from grid line 68 in the north to 52 in the south extending east from the coast to grid line 68. The only previous ecological work on this area was a reconnaissance survey by Adamson and Osborn (1). As can be expected from reconnaissance survey, some generalisations were made which probably apply to part of the Mount Lofty Ranges but not necessarily to the whole. Adamson and Osborn did not publish any vegetation map, nor did they indicate in the text the exact localities studied. Since then detailed work on the soils of the southern portion of the Hundred of Kuitpo, by Taylor and O'Donnell (21) and on the geology by Sprigg (17, 18, 19) form a useful background to this study of ecology. Considering the limited size but complexity of the area, it was deemed necessary that the ecology should be approached from a study of the autecology of the dominant tree species and of the formations. With this in view the distribution of the tree species and formations was mapped by projecting their limits on a contour map. As many factors as possible of the environment were examined and attempts were made to correlate the distribution of the species with the environment. The soils were surveyed by borings at each grid intersection on the ordnance survey maps...

The effects of moisture, cation concentration, temperature, density and composition of soils on their electrical resistivity

Chaudhry, Mohammad Naveed Hayat.
Fonte: Brock University Publicador: Brock University
Tipo: Electronic Thesis or Dissertation
ENG
Relevância na Pesquisa
35.92%
The effects. of moisture, cation concentration, dens ity , temper~ t ure and grai n si ze on the electrical resistivity of so il s are examined using laboratory prepared soils. An i nexpen si ve method for preparing soils of different compositions was developed by mixing various size fractions i n the laboratory. Moisture and cation c oncentration are related to soil resistivity by powe r functions, whereas soil resistiv ity and temperature, density, Yo gravel, sand , sil t, and clay are related by exponential functions . A total of 1066 cases (8528 data) from all the experiments were used in a step-wise multiple linear r egression to determine the effect of each variable on soil resistivity. Six variables out of the eight variables studied account for 92.57/. of the total variance in so il resistivity with a correlation coefficient of 0.96. The other two variables (silt and gravel) did not increase the · variance. Moisture content was found to be - the most important Yo clay. variable- affecting s oil res istivi ty followed by These two variables account for 90.81Yo of the total variance in soil resistivity with a correlation ~oefficient ·.of 0 . 95. Based on these results an equation to ' ~~ed{ ct soil r esist ivi ty using moisture and Yo clay is developed . To t est the predicted equation...

Estudos de solos tropicais para uso em pavimentação a partir de ensaios triaxiais estáticos; Study of tropical soils for use in pavement through static compression test

Dias, Idalíria de Moraes
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 08/08/2007 PT
Relevância na Pesquisa
35.91%
O presente trabalho discute comparativamente o comportamento mecânico de solos lateríticos e não lateríticos para uso em pavimentação. Para tanto foram ensaiados 3 pares de solos, sendo cada par constituído por solos de curvas granulométricas semelhantes, mesma classificação HRB e comportamentos distintos quanto à laterização. Foram realizados ensaios triaxiais convencionais do tipo CD saturado e não saturado sem controle de sucção e ensaios de compressão simples. A partir dos resultados dos ensaios foram modeladas as deformações elásticas em função das tensões de confinamento e determinadas as envoltórias de ruptura de Mohr-Coulomb. Concluiu-se que a maior resistência dos solos lateríticos está representada na componente coesão da envoltória de Mohr-Coulomb e que esta é mobilizada praticamente ao máximo desde o início em um ensaio triaxial. A diferença de resistência entre os ensaios saturados e não saturados também se mostrou na coesão, com a soma nesta da componente coesão aparente, fruto da sucção. O ângulo de atrito mostrou-se constante para as duas gêneses, tanto para a condição saturada como para a condição não saturada. Os solos lateríticos apresentam rigidez maior que os não lateríticos...

Soil suitability for citrus crop production; Florida general soils atlas

East Central Florida Regional Planning Council
Fonte: East Central Florida Regional Planning Council ( Winter Park Fla.? ) Publicador: East Central Florida Regional Planning Council ( Winter Park Fla.? )
Tipo: cartographic Formato: 1 map : col. ; 33 x 26 cm.
Publicado em / 1981/1975 ENGLISH
Relevância na Pesquisa
35.96%
"Source: The Florida general soils atlas."; Daytona Beach is the only Volusia County area shown.; (Funding) Funded in part by the University of Florida, the Florida Heritage Project of the State University Libraries of Florida, the Institute for Museum and Library Services, and the U.S. Department of Education's TICFIA granting program.

Soil suitability for community development; Florida general soils atlas

East Central Florida Regional Planning Council
Fonte: East Central Florida Regional Planning Council ( Winter Park Fla.? ) Publicador: East Central Florida Regional Planning Council ( Winter Park Fla.? )
Tipo: cartographic Formato: 1 map : col. ; 33 x 26 cm.
Publicado em / 1981/1975 ENGLISH
Relevância na Pesquisa
35.96%
"Source: The Florida general soils atlas."; Daytona Beach is the only Volusia County area shown.; (Funding) Funded in part by the University of Florida, the Florida Heritage Project of the State University Libraries of Florida, the Institute for Museum and Library Services, and the U.S. Department of Education's TICFIA granting program.

Soil suitability for sewage lagoons; Florida general soils atlas

East Central Florida Regional Planning Council
Fonte: East Central Florida Regional Planning Council ( Winter Park Fla.? ) Publicador: East Central Florida Regional Planning Council ( Winter Park Fla.? )
Tipo: cartographic Formato: 1 map : col. ; 33 x 26 cm.
Publicado em / 1981/1975 ENGLISH
Relevância na Pesquisa
35.95%
"Source: The Florida general soils atlas."; Daytona Beach is the only Volusia County area shown.; (Funding) Funded in part by the University of Florida, the Florida Heritage Project of the State University Libraries of Florida, the Institute for Museum and Library Services, and the U.S. Department of Education's TICFIA granting program.

Soil suitability as a habitat for wildlife; Florida general soils atlas

East Central Florida Regional Planning Council
Fonte: East Central Florida Regional Planning Council ( Winter Park Fla.? ) Publicador: East Central Florida Regional Planning Council ( Winter Park Fla.? )
Tipo: cartographic Formato: 1 map : col. ; 33 x 26 cm.
Publicado em / 1981/1975 ENGLISH
Relevância na Pesquisa
35.95%
"Source: The Florida general soils atlas."; Daytona Beach is the only Volusia County area shown.; (Funding) Funded in part by the University of Florida, the Florida Heritage Project of the State University Libraries of Florida, the Institute for Museum and Library Services, and the U.S. Department of Education's TICFIA granting program.

Soil suitability for truck crops and improved pasture; Florida general soils atlas

East Central Florida Regional Planning Council
Fonte: East Central Florida Regional Planning Council ( Winter Park Fla.? ) Publicador: East Central Florida Regional Planning Council ( Winter Park Fla.? )
Tipo: cartographic Formato: 1 map : col. ; 33 x 26 cm.
Publicado em / 1981/1975 ENGLISH
Relevância na Pesquisa
35.95%
"Source: The Florida general soils atlas."; Daytona Beach is the only Volusia County area shown.; (Funding) Funded in part by the University of Florida, the Florida Heritage Project of the State University Libraries of Florida, the Institute for Museum and Library Services, and the U.S. Department of Education's TICFIA granting program.

Soil suitability as a habitat for wildlife; Florida general soils atlas

East Central Florida Regional Planning Council
Fonte: East Central Florida Regional Planning Council ( Winter Park Fla.? ) Publicador: East Central Florida Regional Planning Council ( Winter Park Fla.? )
Tipo: cartographic Formato: 1 map : col. ; 33 x 26 cm.
Publicado em / 1981/1975 ENGLISH
Relevância na Pesquisa
35.95%
"Source: The Florida general soils atlas."; Daytona Beach is the only Volusia County area shown.; (Funding) Funded in part by the University of Florida, the Florida Heritage Project of the State University Libraries of Florida, the Institute for Museum and Library Services, and the U.S. Department of Education's TICFIA granting program.

Copper accumulation, distribution and fractionation in vineyard soils of Victoria, Australia

Pietrzak, Ursula; McPhail, Derry
Fonte: Elsevier Publicador: Elsevier
Tipo: Artigo de Revista Científica
Relevância na Pesquisa
35.92%
The use of copper-based fungicides by Victorian vinegrowers has increased the total copper concentration in some vineyard soils to 250 mg/kg compared to background levels of approximately 10 mg/kg. The Australian and New Zealand guidelines for the assessment of contaminated sites recommend that total copper concentrations in soil exceeding 60 mg/kg require environmental investigation, and this level is exceeded in 8 of the 14 vineyards investigated. The focus of this paper is to measure the accumulation, distribution and fractionation of copper in contaminated and uncontaminated soils as a step towards understanding copper existence in soils and its potential for availability to flora and fauna. Physical and chemical properties and total copper concentrations were measured in soil samples from four selected wine-producing regions of Victoria, including vineyard soils and adjacent background soils. Copper fractionation in soils with high total copper concentrations was measured using a selective extraction procedure. Copper in surface soils (0-1 cm) and throughout soil profiles (maximum depth of 50 cm) was separated in the following fractions: water soluble (WS), exchangeable (E), sorbed (S), easily reducible Mn (ERMn), bound to carbonates (CA)...