Relationship between raindrops and ultrasonic energy on the disruption of a Haplic Cambisol

Ribeiro, Bruno Teixeira; Lima, José Maria de; Mello, Carlos Rogério de; Sá, Marcos Aurélio Carolino de; Oliveira, Geraldo César de

doi:10.1590/s1413-70542009000300021

Cited by 10 publications

(9 citation statements)

References 16 publications

(9 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…As amostras saturadas e com umidade equivalente às tensões supracitadas foram submetidas ao ensaio de compressão uniaxial aplicando-se as pressões de 50 e 400 kPa (Soane, 1986). Logo após, as amostras foram submetidas ao impacto de gotas de chuva simulada, de diâmetro 2,45 mm, intensidade de 150 mm h -1 , durante 8 minutos, utilizandose um mini-simulador de chuva (Ribeiro et al, 2009). A chuva simulada aplicada teve uma energia cinética total de 3,79 MJ ha -1 (Ribeiro et al, 2009), com um tempo de retorno de dez anos para a cidade de Lavras, MG (Mello et al, 2001).…”

Section: Methodsunclassified

“…Logo após, as amostras foram submetidas ao impacto de gotas de chuva simulada, de diâmetro 2,45 mm, intensidade de 150 mm h -1 , durante 8 minutos, utilizandose um mini-simulador de chuva (Ribeiro et al, 2009). A chuva simulada aplicada teve uma energia cinética total de 3,79 MJ ha -1 (Ribeiro et al, 2009), com um tempo de retorno de dez anos para a cidade de Lavras, MG (Mello et al, 2001). Todo o material salpicado durante a chuva foi recolhido, seco em estufa a 105º C por 48 horas e relacionado com a área da amostra, expressando-se o resultado em Mg ha -1 .…”

Section: Methodsunclassified

“…Com este trabalho partiu-se da hipótese de que a vinhaça, alterando as cargas superficiais e a resistência de agregados à dispersão (Ribeiro et al, 2009), os limites de consistência (Freire & Aguiar, 1993;Rolim & Freire, 1997; e, também, podendo atuar como um fluído diferente à água, pode alterar atributos mecânicos do solo.…”

Section: Introductionunclassified

See 2 more Smart Citations

Atributos mecânicos e erosão por salpicamento em amostras de latossolo vermelho-amarelo sob efeito de vinhaça

et al. 2011

Self Cite

View full text Add to dashboard Cite

RESUMOObjetivou-se, neste trabalho, quantificar o efeito da vinhaça no comportamento compressivo e nos atributos mecânicos, como consistência, umidade ótima de compactação e densidade máxima, de um Latossolo Vermelho-Amarelo (LVA); avaliar o efeito da vinhaça e do estado de compactação no salpicamento de partículas, da região de Lavras, MG. A vinhaça foi proveniente de um alambique de cachaça artesanal. Foram coletadas amostras deformadas e indeformadas nas profundidades de 0 a 3 cm e 60 a 63 cm. As amostras deformadas destinaram-se à caracterização do solo, determinação dos limites de consistência e realização do ensaio de Proctor Normal, após a incubação do material com vinhaça. As amostras indeformadas foram saturadas com vinhaça ou água destilada (controle), por 48 horas e destinaram-se aos ensaios de compressibilidade e resistência ao salpicamento, usando-se um minisimulador de chuvas. A vinhaça alterou os limites de consistência das camadas estudadas. Para a camada de 0-3 cm a vinhaça reduziu a faixa friável e para a camada 60-63 cm aumentou. Para ambas as camadas, a vinhaça aumentou a D máx e reduziu a U ótima . As camadas 0-3 cm e 60-63 cm, independentemente do tratamento com vinhaça, apresentaram a mesma capacidade suporte de carga. O estado de compactação das amostras influenciou a erosão por salpicamento. O aumento da pressão aplicada sobre as amostras resultou no aumento da quantidade de material salpicado. Na camada 60-63 cm, o tratamento com vinhaça reduziu a quantidade de material salpicado com o aumento da pressão aplicada, notadamente com as amostras na capacidade de campo. Termos para indexação:Compressibilidade, capacidade suporte de carga, estrutura do solo, salpicamento, Proctor Normal. ABSTRACTThe objective of this study was to quantify the effect of plonk on compressive behavior and mechanical attributes such as consistency, optimum moisture for compaction and maximum density of a Red-Yellow Latosol (Oxisol) to evaluate the effect of plonk and compaction state in splashed particles, from Lavras (MG) region. The plonk was obtained from an artisanal sugarcane brandy alembic. Undisturbed and disturbed soil samples were collected at 0 to 3 cm and 60 to 63 cm depths. Disturbed soil samples were used for soil characterization, determination of consistence limits and Normal Proctor essay after material incubation with plonk. Undisturbed soil samples were saturated with plonk or distilled water (control) during 48 hours for testing the compressibility and resistance to splash by using simulated rainfall. The plonk altered the consistence limits of studied layers. For the 0-3 cm layer, the plonk reduced the friable range, and for the 60-63 cm layer the effect was in the opposite direction. For both layers, the plonk increased D max and decreased U optimum . Regardless of the plonk treatment, both layers presented the same load support capacity. The compaction degree of samples influenced the splash erosion. The increase of the applied pressure over the samples resulted in increase of splash materia...

show abstract

Section: Methodsunclassified

See 1 more Smart Citation

Atributos mecânicos e erosão por salpicamento em amostras de latossolo vermelho-amarelo sob efeito de vinhaça

et al. 2011

Self Cite

View full text Add to dashboard Cite

show abstract

“…Therefore, the application of traditional methods, such as wet and dry sieving (Yoder, 1936), simulated raindrop impact resistance, and ultrasonic energy (Ribeiro et al, 2009), is limited (Sá et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Aggregate stability by the "high energy moisture characteristic" method in an oxisol under differentiated management

Silva

Oliveira

Silva

et al. 2014

Rev. Bras. Ciênc. Solo

Self Cite

View full text Add to dashboard Cite

SUMMARYStudies testing the High Energy Moisture Characteristic (HEMC) technique in tropical soils are still incipient. By this method, the effects of different management systems can be evaluated. This study investigated the aggregation state of an Oxisol under coffee with Brachiaria between crop rows and surfaceapplied gypsum rates using HEMC. Soil in an experimental area in the Upper São Francisco region, Minas Gerais, was studied at depths of 0.05 and 0.20 m in coffee rows. The treatments consisted of 0, 7, and 28 Mg ha -1 of agricultural gypsum rates distributed on the soil surface of the coffee rows, between which Brachiaria was grown and periodically cut, and compared with a treatment without Brachiaria between coffee rows and no gypsum application. To determine the aggregation state using the HEMC method, soil aggregates were placed in a Büchner funnel (500 mL) and wetted using a peristaltic pump with a volumetric syringe. The wetting was applied increasingly at two pre-set speeds: slow (2 mm h -1 ) and fast (100 mm h -1 ). Once saturated, the aggregates were exposed to a gradually increasing tension by the displacement of a water column (varying from 0 to 30 cm) to obtain the moisture retention curve [M = f (Ψ Ψ Ψ Ψ Ψ)], underlying the calculation of the stability parameters: modal suction, volume of drainable pores (VDP), stability index (slow and fast), VDP ratio, and stability ratio. The HEMC method conferred sensitivity in quantifying the aggregate stability parameters, and independent of whether gypsum was used, the soil managed with Brachiaria between the coffee rows,

show abstract

“…The results are normally expressed through soil dispersion curves, plotting, for example, the < 2 µm fraction released (dispersed) from aggregates against the respective levels of ultrasonic energy So, 1993, 1994;Ribeiro et al, 2009). Ultrasonic energy irradiation on soil aggregate suspension allows an overview of the aggregate breakdown and dispersion process.…”

Section: Introductionmentioning

confidence: 99%

Aggregate breakdown and dispersion of soil samples amended with sugarcane vinasse

Ribeiro¹,

Lima²,

Curi³

et al. 2013

Sci. agric. (Piracicaba, Braz.)

Self Cite

View full text Add to dashboard Cite

Soil aggregation is a very complex issue related to important soil attributes and processes. The aggregate breakdown and dispersion of soil samples amended with sugarcane vinasse were evaluated using ultrasonic energy. Vinasse is an important byproduct of sugarcane industries, intensively applied to soils in Brazil as liquid fertilizer. Samples of two Oxisols and one Ultisol were used in this study. The physical and chemical characterization of soils was performed, and the 1 to 2 mm size aggregates (200 g) were packed in PVC columns (6.0 cm high and 4.0 cm internal diameter) and incubated with sugarcane vinasse under lab conditions for 1, 30 and 60 days. After incubation, aggregates were submitted to levels of ultrasonic energy, and the particle size distribution (53 to 2,000 µm, 2 to 53 µm, and < 2 µm fractions) was quantifi ed.Mathematical equations were used to relate the mass of aggregates in each of these fractions to the applied ultrasonic energy, and parameters related to aggregate stability were then obtained.Soils showed an aggregate-hierarchy resulting in a stepwise breakdown under ultrasonic agitation. Considering this soil-aggregation hierarchy, vinasse contributed even in a short time to the bonding between and within 2 to 53 µm aggregates, mainly in the Oxisols. This may be related to organic compounds present in the vinasse, cementing soil particles. Potassium enrichment of soil samples did not contribute to soil dispersion.

show abstract

Relationship between raindrops and ultrasonic energy on the disruption of a Haplic Cambisol

Cited by 10 publications

References 16 publications

Atributos mecânicos e erosão por salpicamento em amostras de latossolo vermelho-amarelo sob efeito de vinhaça

Atributos mecânicos e erosão por salpicamento em amostras de latossolo vermelho-amarelo sob efeito de vinhaça

Aggregate stability by the "high energy moisture characteristic" method in an oxisol under differentiated management

Aggregate breakdown and dispersion of soil samples amended with sugarcane vinasse

Contact Info

Product

Resources

About