Soil Particle Size
Mostrando 1-12 de 69 artigos, teses e dissertações.
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1. Effects of addition of engineered ZnO nanoparticles on the stability of colloidal suspensions containing TiO2 interacting with sandy soil
Abstract The stability of colloidal suspensions of engineered nanoparticles in the environment is of great interest for the risk assessment and treatment of hazardous materials. The relevance of this study is due to the evidence that engineered nanoparticles have been produced and used in commercial products in large scale, especially ZnO and TiO2, which are
REM, Int. Eng. J.. Publicado em: 2020-06
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2. PEDOTRANSFER FUNCTION TO ESTIMATE THE SOIL STRUCTURAL “S” INDEX AND SPATIAL VARIABILITY IN AN OXISOL WITHIN A LIVESTOCK FARMING SYSTEM
ABSTRACT Various attributes are often required to build soil quality indicators. However, determining these attributes is time-consuming and requires several specific devices. Thus, it is desirable to develop indexes that express soil quality based on easily determined attributes. The objective of this study was to investigate the spatial variability of the
Eng. Agríc.. Publicado em: 2020-02
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3. A UTILIZAÇÃO DE FITOMASSA NA RECUPERAÇÃO DE SOLO DEGRADADO - VILA BURITI / MANAUS (AM)
Resumo Este trabalho teve como objetivo avaliar a recuperação de uma área degradada a partir do uso de fitomassa associada ao uso da Theobroma Grandiflorun Schum (cupuaçu). Soma-se a esse objetivo o monitoramento do crescimento dos indivíduos da espécie estudada; mensuração do acréscimo de nutrientes ao solo; comparação das propriedades físicas d
Mercator (Fortaleza). Publicado em: 09/12/2019
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4. Water retention capacity in Arenosols and Ferralsols in a semiarid area in the state of Bahia, Brazil
Abstract: One of the most serious problems in areas indicated for irrigation projects in the Brazilian Northeast region is the occurrence of sandy soils, known to have low moisture retention, but occurring in strategic locations in terms of water supply and geographical situation, and which can be used for agricultural purposes. The objective of this study
An. Acad. Bras. Ciênc.. Publicado em: 25/11/2019
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5. Modeling boron adsorption on five soils before and after removal of organic matter
ABSTRACT Boron- B concentrations that cause deficiency and those that cause toxicity appear to be very similar, compared to other nutrients, which can complicate successful management of this element in soils. In this study, B adsorption onto two Oxisols from Brazil (Rhodic Eutroperox and Anionic Acroperox), two Alfisols (Natric Palexeralf and Aridic Paleust
Sci. agric. (Piracicaba, Braz.). Publicado em: 04/11/2019
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6. A comparative study of particle size distribution using analysis of variance for sedimentation and laser diffraction methods
Resumo A análise granulométrica é uma ferramenta básica no processo de caracterização de materiais particulados, podendo ser obtida por vários métodos, destacando-se os métodos do densímetro e difração a laser. No entanto, estas técnicas são baseadas em princípios físicos distintos, que geram resultados diferentes, causando dúvidas. O objeti
Cerâmica. Publicado em: 15/08/2019
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7. Field Description and Identification of Diagnostic Qualifiers for Urban Soils in Brazil
ABSTRACT Human activities often alter soils found in urban areas. These alterations affect their environmental functions and potential for use. However, soils from urban areas in Brazil have not been surveyed and identified, which can pose a technical problem for the development of the city. Considering the importance of urban environments and their soils, t
Rev. Bras. Ciênc. Solo. Publicado em: 19/06/2019
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8. Shear Strength of a typical soil from Manaus, Brazil, stabilized with ceramic residue additive
ABSTRACT The purpose of this study is to determine the geotechnical behavior of a clayey surface soil typical to the Manaus region (Amazonas, Brazil), when mixed with ceramic powder from brick residue produced by potteries located in the county of Iranduba, Amazonas, Brazil, and with residual sand (the reference mixture), commonly used in pavements in the re
Matéria (Rio J.). Publicado em: 10/06/2019
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9. Carbon in Physical Fractions and Organic Matter Chemical Composition of an Acrisol after Amazon Forest Burning and Conversion into Pasture
The aim of this study was to investigate impacts of Amazon Forest (AF) fire and conversion to pasture on carbon accumulation in particle size fractions and organic matter (OM) composition of an Acrisol. Soil samples were collected (0.00-2.00 m depth) in three sites: native AF (NAF); AF under natural regeneration for two years after burning (BAF); 23-years ol
J. Braz. Chem. Soc.. Publicado em: 2019-02
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10. Soil Water Retention Curve as Affected by Sample Height
ABSTRACT: The soil water retention curve is one of the main instruments to assess the soil physical quality and to improve soil management. Traditionally, the equipment most used in the laboratory to determine the retention curve has been Haines funnels and Richards chambers. An important factor to which little attention has been given in the use of these eq
Rev. Bras. Ciênc. Solo. Publicado em: 14/11/2018
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11. Satellite Spectral Data on the Quantification of Soil Particle Size from Different Geographic Regions
ABSTRACT: The study of soils, including their physical and chemical properties, is essential for agricultural management. Soil quality must be maintained to ensure sustainable production of food and conservation of natural resources. In this context, soil mapping is important to provide spatial information, which can be performed using remote sensing (RS) te
Rev. Bras. Ciênc. Solo. Publicado em: 17/09/2018
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12. Carbon Stocks and Pools in Relation to the Texture of Kaolinitic Soils from the Brazilian East Coast
ABSTRACT: Extremely kaolinitic soils of Tertiary age elevations on the Brazilian east coast present a wide range of texture, which is recognized as one of the main factors controlling the soil organic matter contents. This study aimed to investigate the organic C storage of different compartments of kaolinitic soils. The studied soils had a wide particle siz
Rev. Bras. Ciênc. Solo. Publicado em: 17/09/2018