Consulta: creatorFacets:"Iori,Piero"
Registros recuperados: 7
Data/hora: 11/06/2024 04:47:33

Prediction of soil shear strength in agricultural and natural environments of the Brazilian Cerrado
Provedor de dados: 86
Autores: Silva,Reginaldo Barboza da; Dias Junior,Moacir de Souza; Iori,Piero; Silva,Francisca Alcivânia de Melo; Folle,Sergio Mauro; Franz,Claudio Alberto Bento; Souza,Zigomar Menezes de.
The objective of this work was to develop uni- and multivariate models to predict maximum soil shear strength (τmax) under different normal stresses (σn), water contents (U), and soil managements. The study was carried out in a Rhodic Haplustox under Cerrado (control area) and under no-tillage and conventional tillage systems. Undisturbed soil samples were taken in the 0.00-0.05 m layer and subjected to increasing U and σn, in shear strength tests. The uni- and multivariate models - respectively τmax=10(a+bU) and τmax=10(a+bU+cσn) - were significant in all three soil management systems evaluated and they satisfactorily explain the relationship between U, σn, and τmax. The soil under Cerrado has the highest shear strength (τ) estimated with the univariate...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cohesion limits; Machine-ground interaction; Mechanical resistance; Precompression stress; Soil compaction; Soil physical quality.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2015000100082

Pressão de preconsolidação como ferramenta de análise da sustentabilidade estrutural de classes de solos com diferentes usos
Provedor de dados: 90
Autores: Iori,Piero; Silva,Reginaldo Barboza da; Dias Júnior,Moacir de Souza; Lima,José Maria de.
O principal problema ambiental causado pelo uso do solo em áreas de preservação permanente longitudinais aos rios é a supressão da mata ciliar. O tipo e a intensidade desse uso alteram a estrutura do solo e comprometem as funções físicas dessas áreas, principalmente próximo aos cursos d'água. O objetivo deste trabalho foi avaliar a sustentabilidade estrutural, a partir do ensaio de compressão uniaxial, de três classes de solo (Cambissolo Háplico, Argissolo Amarelo e Gleissolo Háplico) e o impacto de diferentes tipos de usos do solo - não permitido pela legislação ambiental - de áreas de preservação permanente na sub-bacia do rio Ribeira de Iguape, SP. Foram delimitadas na área experimental três classes de solo: Cambissolo, Argissolo e Gleissolo. Numa...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Capacidade de suporte de carga; Modelagem; Vale do Ribeira.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000500008

Influence of field slope and coffee plantation age on the physical properties of a red-yellow Latosol
Provedor de dados: 90
Autores: Iori,Piero; Dias Junior,Moacir de Souza; Ajayi,Ayodele Ebenezer; Guimarães,Paulo Tácito Gontijo; Abreu Júnior,Áureo Aparecido.
In modern agriculture, several factors cause changes in the soil physical properties. The time of establishment of a crop (plantation age) and the slope are examples of factors that moderate the impact of mechanized operations on the soil structure. The objective of this study was to analyze the effect of machinery traffic on the physical properties of a Red-Yellow Latosol under coffee plantations with different ages (2, 7, 18, and 33 years) and slope positions (3, 9 and 15 %). Samples were collected from three positions between coffee rows (lower wheel track, inter-row and upper wheel track) and at two depths (surface layer and sub-surface). Changes in the total porosity, macroporosity, microporosity, organic matter, bulk density, and aggregate stability...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agricultural traffic; Coffea arabica L.; Soil degradation; Aggregate stability.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000100010

Growth and yield of anthurium in response to sawdust mulching
Provedor de dados: 65
Autores: Lima,Juliana Domingues; Zanetti,Samara; Nomura,Edson Shigueaki; Fuzitani,Eduardo Jun; Rozane,Danilo Eduardo; Iori,Piero.
ABSTRACT: The objectives of the study were to analyze the effect of sawdust mulch on the: (1) soil characteristics; (2) growth and flower yield of the anthurium cv. 'Apalai'. Assay was conducted in a totally randomized design in subdivided plots, with five treatments and eight replications. The treatment consisted of five volumes of sawdust 0, 20, 40, 60 and 80L m-2, distributed over the bed, every three months. Soil, plants and flower stalks were evaluated during two years. Soil temperature, moisture, organic matter, bulk density and water retention conditions were improved, while the leaf area of plants and the yield of flower stalks were increased when the soil were mulched with sawdust. In addition to increasing soil organic matter, however, no change...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Floriculture; Anthurium andraeanum; Soil cover; Wood residue; Flowering interval.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000300440

Load-bearing capacity of a red-yellow latosol cultivated with coffee plants subjected to different weed managements
Provedor de dados: 64
Autores: Pais,Paula Sant'Anna Moreira; Dias Junior,Moacir de Souza; Dias,Adriana Cristina; Iori,Piero; Guimarães,Paulo Tácito Gontijo; Santos,Gislene Aparecida dos.
It is essential to know the levels of pressure applied to the soil by different weed managements to adapt the management of coffee plantations in a sustainable manner. The objectives of this study were: a) to generate load-bearing capacity models of a Red-Yellow Latosol (Oxisol) submitted to different weed managements and b) to determine which weed management resulted in higher compression. The study was conducted at the Experimental Farm of EPAMIG, located near the community Farias, in Lavras-MG (latitude 21° 14' 43" S and longitude 44° 59' 59" W and altitude of 919 m). The soil is a Red-Yellow Latosol (LVA) cultivated with coffee plantation using Topazio MG 1190 coffee variety, since 2006. We evaluated five weed managements, three being through...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coffee culture; Soil compaction; Sustainability; Preconsolidation stress; Soil structure.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542013000200005

Comparison of field and laboratory models of the load bearing capacity in coffee plantations
Provedor de dados: 64
Autores: Iori,Piero; Dias Junior,Moacir de Souza; Ajayi,Ayodele Ebenezer; Guimarães,Paulo Tácito Gontijo; Pais,Paula Sant'Anna Moreira; Andrade,Maria Luiza de Carvalho.
Precompression stress is an important property for assessment of tropical soil structure sustainability and is often determined in laboratory tests. The objective of this study was to compare the load bearing capacity models obtained with controlled moisture in laboratory and those obtained with natural field moistures determined a long one year. The evaluation of soil structural sustainability follows four distinct steps: soil sampling in the field, uniaxial compression test of the samples in the laboratory, determination of precompression stress and estimation of the load bearing capacity models. Laboratory estimates of precompression stress were obtained from moisture controlled in laboratory and from natural moisture determined in a field a long one...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agricultural traffic; Coffea Arabica L.; Homogeneity test; Precompression stress.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542013000200003

Contact pressures and the impact of farm equipment on Latosol with the presence and absence of sugarcane straw
Provedor de dados: 64
Autores: Silva,Reginaldo Barboza da; Iori,Piero; Souza,Zigomar Menezes de; Pereira,Danilo de Moraes Gomes; Vischi Filho,Oswaldo Julio; Silva,Francisca Alcivania de Melo.
ABSTRACT High contact pressures applied to soil result in a greater degree of compaction, in addition to promoting other negative effects. The objective of this study was to quantify contact areas by using different methodologies, and pressures of farm equipment employed in production activity and evaluate structural changes caused in a Red Latosol with the presence and absence of straw cover. The design was completely randomized in a factorial scheme of type 4 (tire on front axle, tire on rear axle, tire on a sugarcane wagon and metallic track of sugar cane Harvester) x 2 (presence and absence of straw). The contact area (CA) of the run was obtained by three procedures: analytical measure of the area of an ellipse (CA1); digital measurement of area of an...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Farming traction tire; Farming trailer tire; Metal track; Wheel soil interaction.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542016000300265