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| Registros recuperados: 65 | |
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| Roque,Márcio William; Matsura,Edson Eiji; Souza,Zigomar Menezes de; Bizari,Douglas Roberto; Souza,Anderson Luiz de. |
| A resistência do solo ao penetrômetro exerce grande influência sobre o crescimento e desenvolvimento vegetal, uma vez que o crescimento das raízes, assim como o rendimento das culturas, varia de forma inversamente proporcional ao seu valor. Dessa forma, a análise da variabilidade espacial da resistência do solo ao penetrômetro e da produtividade, por meio da geoestatística, pode indicar alternativas de manejo para reduzir os efeitos da variabilidade do solo sobre a produtividade e também melhorar a estimativa de respostas das culturas sob determinadas práticas de manejo. Diante do exposto, o objetivo deste trabalho foi relacionar e caracterizar a variabilidade espacial da resistência do solo ao penetrômetro (RP) e a produtividade do feijoeiro irrigado em... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Variabilidade espacial; Krigagem; Compactação do solo; Manejo do solo. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832008000500004 |
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| Cavalcante,Eloiza Gomes Silva; Alves,Marlene Cristina; Souza,Zigomar Menezes de; Pereira,Gener Tadeu. |
| O uso e manejo do solo e da cultura são importantes condicionadores da variabilidade de atributos do solo. O trabalho foi desenvolvido em Selvíria (MS), com o objetivo de avaliar a variabilidade espacial do pH, potássio (K), cálcio (Ca), magnésio (Mg) e saturação por bases (V) em Latossolo Vermelho sob diferentes usos e manejos. Os solos foram amostrados em malha, com intervalos regulares de 2 m, perfazendo o total de 64 pontos, nas profundidades de 0,0-0,1 e 0,1-0,2 m, nas seguintes áreas: vegetação natural (Cerrado), plantio direto, plantio convencional e pastagem. As maiores variabilidades, medidas por meio do coeficiente de variação, foram observadas para K, Mg e Ca; o pH apresentou o menor coeficiente de variação nos diferentes usos e manejo do solo,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Preparo do solo; Amostragem; Geoestatística; Agroecossistemas; Latossolo. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832007000600012 |
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| Silva,Douglas Marcelo Pinheiro da; Campos,Milton César Costa; Franciscon,Uilson; Alho,Leandro Coutinho; Santos,Luis Antônio Coutrim dos; Paula Neto,Pérsio de; Bergamin,Anderson Cristian; Souza,Zigomar Menezes de. |
| ABSTRACT Soils with an A horizon formed by human activity, an anthropogenic A horizon, are found in the Amazon Region. Few studies have examined the spatial distribution of the properties of these soils. We mapped the spatial variability of some soil properties in an area of Archaeological Dark Earth (ADE) in the Brazilian Amazon. A sampling grid was defined over an area of 42 × 88 m under cacao cultivation in which sampling points were established at a spacing of 6 × 8 m, for a total of 88 points. Samples were collected from the 0.00-0.05, 0.05-0.10, 0.10-0.20, and 0.20-0.30 m depth layers. Soil texture, aggregate stability, and organic carbon (OC) analyses were performed on disturbed soil samples. Undisturbed samples were used to determine soil... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Indian Dark Earth; Management systems; Amazon soils; Anthropogenic soils. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100415 |
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| Souza,Gustavo Soares de; Souza,Zigomar Menezes de; Silva,Reginaldo Barboza da; Barbosa,Ronny Sobreira; Araújo,Fernando Silva. |
| The cultivation of sugarcane with intensive use of machinery, especially for harvest, induces soil compaction, affecting the crop development. The control of agricultural traffic is an alternative of management in the sector, with a view to preserve the soil physical quality, resulting in increased sugarcane root growth, productivity and technological quality. The objective of this study was to evaluate the physical quality of an Oxisol with and without control traffic and the resulting effects on sugarcane root development, productivity and technological quality. The following managements were tested: no traffic control (NTC), traffic control consisting of an adjustment of the track width of the tractor and sugarcane trailer (TC1) and traffic control... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural mechanization; Soil compaction; Root system; Technological variables; Saccharum sp. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000100013 |
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| Tavares,Rose Luiza Moraes; Souza,Zigomar Menezes de; Scala Jr,Newton La; Castioni,Guilherme Adalberto Ferreira; Souza,Gustavo Soares de; Torres,José Luiz Rodrigues. |
| ABSTRACT The sugarcane green harvest system, characterized by mechanized harvesting and the absence of crop burning, affects soil quality by increasing crop residue on the soil surface after harvest; thus, it contributes to improving the physical, chemical, and microbiological properties and influences the soil carbon content and CO2 flux (FCO2). This study aimed to evaluate the spatial and temporal variability of soil FCO2 in sugarcane green harvest systems. The experiment was conducted in two areas of sugarcane in São Paulo, Brazil: the first had a 5-year history of sugarcane green harvest (SG-5) and the second had a longer history of 10 years (SG-10). The temporal FCO2 were evaluated in the dry and rainy periods, and spatial variability in the dry... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: CO2 emission; Soil respiration; Straw; Mechanized harvest; Physical properties. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100524 |
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| Gennaro,Lorena Adriana de; Souza,Zigomar Menezes de; Silva,Laura Fernanda Simões da; Cooper,Miguel; Campos,Milton César Costa. |
| O manejo agrícola influencia a estrutura do solo, modificando os atributos físicos e o comportamento hídrico do solo. O objetivo deste trabalho foi avaliar os efeitos da semeadura direta (SD) e do preparo convencional (PC) sobre a estrutura do solo, por meio de atributos físicos e da distribuição dos poros, utilizando imagens digitais 2-D. O estudo foi realizado em um Latossolo Vermelho distroférrico com delineamento de blocos casualizados. A densidade do solo, macroporosidade, diâmetro médio ponderado (DMP), condutividade hidráulica do solo saturado (Kfs) e análise de imagens digitais 2-D (resolução de 156,25 μm2) foram avaliadas nas profundidades de 0-0,20 e 0,20-0,40 m. Os manejos não diferiram para a densidade e macroporosidade do solo. A SD revelou... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Preparo convencional; Semeadura direta; Análise de imagem; Monólitos; Phaseolus vulgaris. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000200608 |
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| Torres,José Luiz Rodrigues; Pereira,Marcos Gervasio; Assis,Renato Lara de; Souza,Zigomar Menezes de. |
| A utilização do sistema de semeadura direta associado ao uso de plantas de cobertura e à rotação de culturas altera alguns atributos físicos do solo e pode indicar mudança em sua qualidade. Este estudo objetivou utilizar o índice de estabilidade de agregados (IEA) e o índice de sensibilidade (IS) para avaliar alterações nos atributos físicos do solo com o uso de diferentes plantas de cobertura após 12 anos de semeadura direta. Com delineamento de blocos ao acaso, utilizaram-se as coberturas: crotalária, milheto, sorgo, braquiária, pousio (vegetação espontânea), amostradas no ano de 2012, mais uma testemunha sem cobertura (semeadura convencional) desde o ano de 2000, em que foram coletadas três amostras por parcela, perfazendo um total de 12 amostras por... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Plantio direto; Agregação; Densidade do solo. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000200428 |
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| Carvalho,Thayla Morandi Ridolfi de; Moura,Daniella Jorge de; Souza,Zigomar Menezes de; Souza,Gustavo Soares de; Bueno,Leda Gobbo de Freitas; Lima,Karla Andrea Oliveira de. |
| The objective of this research was to evaluate different minimum ventilation systems, in relation to air quality and thermal comfort using geostatistics in brooding phase. The minimum ventilation systems were: Blue House I: exhaust fans + curtain management (end of the building); Blue House II: exhaust fans + side curtain management; and Dark House: exhaust fans + flag. The climate variables evaluated were: dry bulb temperature, relative humidity, air velocity, carbon dioxide and ammonia concentration, during winter time, at 9 a.m., in 80 equidistant points in brooding area. Data were evaluated by geostatistic technique. The results indicate that Wider broiler houses (above 15.0 m width) present the greatest ammonia and humidity concentration. Blue House... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Air quality; Environment; Kriging; Poultry; Welfare. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000100028 |
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| Gennaro,Lorena Adriana De; Souza,Zigomar Menezes de; Weill,Mara de Andrade Marinho; Souza,Gustavo Soares de; Alves,Marlene Cristina. |
| Agricultural management systems can alter the physical and biological soil quality, interfering with crop development. The objective of this study was to evaluate the physical and microbiological attributes of a Red Latosol, and its relationship to the biometric parameters of the common bean (Phaseolus vulgaris), irrigated and grown under two management systems (conventional tillage and direct seeding), in Campinas in the state of São Paulo, Brazil. The experimental design was of randomised blocks, with a split-plot arrangement for the management system and soil depth, analysed during the 2006/7 and 2007/8 harvest seasons, with 4 replications. The soil physical and microbiological attributes were evaluated at depths of 0.00-0.05, 0.05-0.10, 0.10-0.20 and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil structure; Soil organic matter; Soil microbial activity; Direct seeding; Phaseolus vulgaris. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000400002 |
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| Montanari,Rafael; Marques Júnior,José; Campos,Milton César Costa; Souza,Zigomar Menezes de; Camargo,Lívia Arantes. |
| As diferentes feições da superfície terrestre, expressas pelo relevo, são capazes de provocar variações nos atributos do solo em magnitudes diferenciadas, dependentes, principalmente, de um local específico da paisagem. Sendo assim, o objetivo deste trabalho foi realizar a caracterização mineralógica de Latossolos em diferentes feições do relevo na região de Jaboticabal, SP. Foram abertas três trincheiras nas pedoformas convexa, linear e côncava e, em seguida, foram realizadas a descrição morfológica dos horizontes e coleta de solo para caracterização física, química e mineralógica. Constatou-se que a mineralogia oxídica é dependente do tipo de pedoforma, com dominância de goethita na pedoforma côncava e a hematita dominou em pedoforma linear. Os minerais... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Forma da paisagem; Pedogênese; Mineralogia do solo. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902010000200004 |
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| Campos,Milton César Costa; Marques Júnior,José; Souza,Zigomar Menezes de; Siqueira,Diego Silva; Pereira,Gener Tadeu. |
| The geomorphic surface concept allows interrelationship among various branches of soil sciences, such as geology, geomorphology and pedology. This association enhances the understanding of spatial soil distribution through landscape, pointing out the soil attributes behavior, which are mainly related to stratigraphy and relief forms. Therefore, this study aims to apply multivariate statistics to categorize geomorphic surfaces in sandstone - basalt lithosequence, so as to provide a basis for soil assessment in similar areas. The study area is located in Pereira Barreto County, SP, Brazil. An area of 530 hectare was selected, where three geomorphic surfaces (I, II and III) were located and mapped. In this area, 134 soil samples were collected at depths of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil Science; Geomorphology; Multivariate analysis. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902012000300003 |
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| Tavares,Rose Luiza Moraes; Oliveira,Stanley Robson de Medeiros; Barros,Flávio Margarito Martins de; Farhate,Camila Viana Vieira; Souza,Zigomar Menezes de; Scala Junior,Newton La. |
| ABSTRACT: The Random Forest algorithm is a data mining technique used for classifying attributes in order of importance to explain the variation in an attribute-target, as soil CO2 flux. This study aimed to identify prediction of soil CO2 flux variables in management systems of sugarcane through the machine-learning algorithm called Random Forest. Two different management areas of sugarcane in the state of São Paulo, Brazil, were selected: burned and green. In each area, we assembled a sampling grid with 81 georeferenced points to assess soil CO2 flux through automated portable soil gas chamber with measuring spectroscopy in the infrared during the dry season of 2011 and the rainy season of 2012. In addition, we sampled the soil to evaluate physical,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Saccharum officinarum; Soil respiration; Green sugarcane; Clay. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000400281 |
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| Souza,Zigomar Menezes de; Marques Júnior,José; Pereira,Gener Tadeu; Barbieri,Diogo Mazza. |
| Soils with small variations in relief and under the same management system present differentiated spatial variabilities of their attributes. This variability is a function of soil position in the landscape, even if the relief has little expression. The aim of this work was to investigate the effects of relief shape and depth on spatial variability of soil chemical attributes in a Typic Hapludox cultivated with sugar cane at two landscape compartments. Soil samples were collected in the intercrossing points of a grid, in the traffic line, at 0-0.2 m and 0.6-0.8 m depths, comprising a set of 100 georeferenced points. The spatial variabilities of pH, P, K, Ca, Mg, cation exchange capacity and base saturation were quantified. Small relief shape variations lead... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Geostatistics; Kriging; Relief; Sugar cane. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000200008 |
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| Curi,Thayla Morandi Ridolfi de Carvalho; Conti,Dante; Vercellino,Rimena do Amaral; Massari,Juliana Maria; Moura,Daniella Jorge de; Souza,Zigomar Menezes de; Montanari,Rafael. |
| ABSTRACT Ventilation systems are incorporated at intensive poultry farms to control environment conditions and thermal comfort of broilers. The ventilation system operates based on environmental data, particularly measured by sensors of temperature and relative humidity. Sensors are placed at different positions of the facility. Quality, number and positioning of the sensors are critical factors to achieve an efficient performance of the system. For this reason, a strategic positioning of the sensors associated to controllers could support the maintenance and management of the microclimate inside the facility. This research aims to identify the three most representative points for the positioning of sensors in order to support the ventilation system during... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Broiler farms; Environmental control; Geostatistics; Ordinary kriging; Welfare. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162017000200101 |
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| Tavares,Rose Luiza Moraes; Siqueira,Diego Silva; Panosso,Alan Rodrigo; Castioni,Guilherme Adalberto Ferreira; Souza,Zigomar Menezes de; Scala Jr.,Newton La. |
| ABSTRACT The harvesting system of green sugarcane, characterized by mechanized harvesting and no crop burning, affects soil quality by increasing the remaining straw left on the soil surface after harvesting, thus, contributing to the improvement of physical, chemical, and microbiological soil attributes, influencing CO2 fluxes. This study aimed to evaluate CO2 fluxes and their relation to soil properties in sugarcane crops under different harvesting managements: burned (B), Green harvesting for 5 years (G-5) and Green harvesting for ten years (G-10). For this, a 1 ha sampling grid with 30 points was installed in each area, all located in the Northeast of São Paulo State, Brazil. In each point, CO2 fluxes were measured and the soil was sampled to analyze... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sacharum officinarum; Principal component analysis; Porosity; Biomass. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162016000600543 |
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| Farhate,Camila Viana Vieira; Souza,Zigomar Menezes de; Oliveira,Stanley Robson de Medeiros; Carvalho,João Luís Nunes; Scala Júnior,Newton La; Santos,Ana Paula Guimarães. |
| ABSTRACT: The use of data mining is a promising alternative to predict soil respiration from correlated variables. Our objective was to build a model using variable selection and decision tree induction to predict different levels of soil respiration, taking into account physical, chemical and microbiological variables of soil as well as precipitation in renewal of sugarcane areas. The original dataset was composed of 19 variables (18 independent variables and one dependent (or response) variable). The variable-target refers to soil respiration as the target classification. Due to a large number of variables, a procedure for variable selection was conducted to remove those with low correlation with the variable-target. For that purpose, four approaches of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil CO2 emission; Data mining; Variable selection; Soil temperature; Soil organic matter. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000300216 |
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| Souza,Zigomar Menezes de; Paixão,Antônio Claret Strini; Prado,Renato de Mello; Cesarin,Luiz Gilberto; Souza,Sandro Rogério de; Montanari,Rafael. |
| Com o uso de variedades adaptadas e o manejo do solo pós-colheita da soqueira de cana-de-açúcar em sistema de colheita mecanizada, poderá ser afetada a incidência de pragas e a produtividade do canavial. Assim, desenvolveu-se o presente trabalho com o objetivo de se avaliar a influência da palhada de dezoito variedades de cana-de-açúcar submetidas a diferentes sistemas de manejo de colheita mecânica, sem queima, na produtividade agrícola e na incidência de broca-comum e cigarrinha-das-raízes na cultura de cana-de-açúcar. Os tratamentos foram constituídos pela presença da palha sem trituração/sem cultivo (PST/SC); palha sem trituração/com cultivo com escarificador (PST/CC); palha triturada/com cultivo com escarificador (PT/CC). O rendimento de colmos na... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Saccharum spp; Diatraea saccharalis; Mahamarva fimbriolata; Cana crua; Palhada. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052008000200017 |
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| Registros recuperados: 65 | |
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