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| Silva,Bruno Montoani; Oliveira,Geraldo César de; Serafim,Milson Evaldo; Silva Júnior,João José da; Colombo,Alberto; Lima,José Maria de. |
| O objetivo deste trabalho foi determinar a acurácia da sonda de multisensores de capacitância "Delta-T Profile probe PR2/6", na avaliação do conteúdo de água do solo com uso de calibrações padrão do fabricante, realizar a calibração para condições específicas de locais e profundidades de amostragem do solo e obter coeficientes de calibração para medições acuradas em tempo real. Em janeiro de 2010, foram coletadas amostras de solo com estrutura preservada a diferentes profundidades, nas linhas de plantio do cafeeiro e nas entrelinhas. As análises foram realizadas em laboratório, com o sensor ML2x Theta probe. Após a obtenção das leituras do sensor, o teor de água foi determinado por meio do método gravimétrico. Foram utilizadas amostras de Latossolo... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffea arabica; Constante dielétrica; Manejo do solo; Solos intemperizados; Sonda FDR; Umidade no solo. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000200017 |
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| Serafim,Milson Evaldo; Oliveira,Geraldo César de; Vitorino,Antonio Carlos Tadeu; Silva,Bruno Montoani; Carducci,Carla Eloize. |
| Cafeicultores da região fisiográfica do Alto São Francisco, MG, Brasil, vêm adotando novo sistema de cultivo, considerado conservacionista do solo, cujos efeitos na qualidade física do solo precisam ser avaliados. Este trabalho foi realizado com o objetivo de estudar a qualidade física de um Latossolo e um Cambissolo, localizados em áreas contíguas, sob cultivo comercial de café. A área localizada no topo da paisagem é recoberta por Cambissolo Háplico Tb distrófico latossólico; a outra, no terço médio, é recoberta por Latossolo Vermelho distrófico. Em cada área foram amostradas as profundidades de 0-0,05 e 0,75-0,80 m, nas posições linha e entrelinha do cafeeiro, totalizando quatro situações em cada solo. Para cada situação, foram coletadas 21 amostras com... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: IHO; Cafeicultura; Sistema conservacionista; Qualidade física do solo. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000300020 |
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| Silva,Bruno Montoani; Silva,Érika Andressa da; Oliveira,Geraldo César de; Ferreira,Mozart Martins; Serafim,Milson Evaldo. |
| The plant-available water capacity of the soil is defined as the water content between field capacity and wilting point, and has wide practical application in planning the land use. In a representative profile of the Cerrado Oxisol, methods for estimating the wilting point were studied and compared, using a WP4-T psychrometer and Richards chamber for undisturbed and disturbed samples. In addition, the field capacity was estimated by the water content at 6, 10, 33 kPa and by the inflection point of the water retention curve, calculated by the van Genuchten and cubic polynomial models. We found that the field capacity moisture determined at the inflection point was higher than by the other methods, and that even at the inflection point the estimates... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Field capacity; Permanent wilting point; Soil water retention curve modeling; Oxisol; Land use planning. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000200011 |
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| Silva,Érika Andressa da; Oliveira,Geraldo César de; Silva,Bruno Montoani; Carducci,Carla Eloize; Avanzi,Junior Cesar; Serafim,Milson Evaldo. |
| Studies 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 surface-applied 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... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aggregation; Coffee production; Management systems; Method. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000500028 |
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| Barros,Dalmo Arantes de; Pereira,José Aldo Alves; Ferreira,Mozart Martins; Silva,Bruno Montoani; Ferreira Filho,Diógenes; Nascimento,Gleisson de Oliveira. |
| Mining contributes to the life quality of contemporary society, but can generate significant impacts, these being mitigated due to environmental controls adopted. This study aimed to characterize soil physical properties in high-altitude areas affected by bauxite mining, and to edaphic factors responses to restoration techniques used to recover mined areas in Poços de Caldas plateau, MG, Brazil. The experiment used 3 randomized block design involving within 2 treatments (before mining intervention and after environmental recovery), and 4 replicates (N=24). In each treatment, soil samples with deformed structures were determined: granulometry, water-dispersible clay content, flocculation index, particle density, stoniness level, water aggregate stability,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Environmental recovery; Physical soil quality; Soil recovery. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542013000500005 |
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| Silva,Bruno Montoani; Santos,Walbert Junior Reis dos; Oliveira,Geraldo César de; Lima,José Maria de; Curi,Nilton; Marques,João José. |
| The knowledge of the water content in the soil profile is essential for an efficient management of crop growth and development. This work aimed to use geostatistical techniques in a spatio-temporal study of soil moisture in an Oxisol in order to provide that information for improved crop management. Data were collected in a coffee crop area at São Roque de Minas, in the upper São Francisco River basin, MG state, Brazil. The soil moisture was measured with a multi-sensor capacitance (MCP) probe at 10-, 20-, 30-, 40-, 60- and 100-cm depths between March and December, 2010. After adjusting the spherical semivariogram model using ordinary least squares, best model, the values were interpolated by kriging in order to have a continuous surface relating depth x... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water use efficiency; Soil management; Deep soil tillage; Plant-available water; Arabica coffee. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542015000100039 |
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| Silva,Bruno Montoani; Silva,Sérgio Henrique Godinho; Oliveira,Geraldo Cesár de; Peters,Petrus Hubertus Caspar Rosa; Santos,Walbert Júnior Reis dos; Curi,Nilton. |
| Digital techniques and tools can assist not only in the prediction of soil properties, such as soil moisture, but also in planning the use and management of areas for agriculture and, or, environmental purposes. In this sense, this work aimed to study wetness indexes methods, defining the spatial resolution and selecting the estimation method that best correlates with water content data measured in the field, evaluating even moisture at different soil depths and seasons. This study was developed in a landscape with strongly undulated relief and covered with Nitosols at the summit and upper middle third, and Argisols at the low middle third, ranging in altitude from 845 to 890 m, located in the southern state of Minas Gerais, Brazil. It were performed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Terrain attributes; Soil water content determination; Relief; Water dynamics. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000200005 |
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| Siqueira,Raphael Henrique da Silva; Ferreira,Mozart Martins; Alcântara,Elifas Nunes de; Silva,Bruno Montoani; Silva,Raphael Comanducci. |
| Weed control in different crops affects the chemical, physical, and biological properties of the soil and consequently its structural quality. The objective of this study was to evaluate, using water retention characteristics and the S index, the physical quality of an Oxisol (Red-Yellow Latosol), subjected to weed control during the cultivation of coffee. The following weed control methods were evaluated: harrowing, brushcutting, residue crushing, manual weeding, post-emergence herbicide application, pre-emergence herbicide application, and maintenance of soil cover with peanut forage, Brachiaria grass, and spontaneous vegetation (no weed treatment). The following properties were determined for physical characterization of the soil: bulk density, total... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Weed management; Physical quality of the soil; Soil water retention. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000500006 |
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