Consulta: creatorFacets:"Avanzi,Junior Cesar"
Registros recuperados: 22
Data/hora: 02/06/2024 18:58:04

Straw production and agronomic performance of soybean intercropped with forage species in no-tillage system
Provedor de dados: 86
Autores: Andrade,Carlos Augusto Oliveira de; Borghi,Emerson; Bortolon,Leandro; Bortolon,Elisandra Solange Oliveira; Camargo,Francelino Peteno de; Avanzi,Junior Cesar; Simon,Jones; Silva,Rubens Ribeiro da; Fidelis,Rodrigo Ribeiro.
Abstract: The objective of this work was to evaluate the straw production and the agronomic performance of soybean intercropped with oversown forage species, in no-tillage system. A randomized complete block design was carried out with four replicates, in a 5×2+2 factorial arrangement, as follows: five forage species - Urochloa brizantha 'Marandu', Urochloa ruziziensis, Panicum maximum 'Mombaça', Panicum maximum 'Massai', and Pennisetum americanum -, intercropped with soybean over two crop years (2013/2014 and 2014/2015), plus two controls, with P. americanum sowed in succession to soybean or with soybean monocropping followed by winter fallow (traditional cultivation). Soybean yield components and forage straw yield were evaluated. None of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max; Integrated crop-livestock system; Oversowing; Plant cover; Soil cover crops.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001000861

Perdas de solo, água, nutrientes e carbono orgânico em Cambissolo e Latossolo sob chuva natural
Provedor de dados: 86
Autores: Silva,Antonio Marcos da; Silva,Marx Leandro Naves; Curi,Nilton; Lima,José Maria de; Avanzi,Junior Cesar; Ferreira,Mozart Martins.
A erosão hídrica é responsável por perdas de nutrientes e carbono dos solos agrícolas. A minimização das perdas de solo, água, nutrientes e carbono orgânico constitui importante aspecto do planejamento conservacionista. Os objetivos deste trabalho foram avaliar as perdas, por erosão hídrica, de solo, água, nutrientes e carbono orgânico em Cambissolo Háplico Tb distrófico típico (CXbd) e Latossolo Vermelho distroférrico típico (LVdf). As coletas foram realizadas depois de cada evento de chuva considerada erosiva. As perdas médias anuais de solo foram de 205,65 Mg ha-1 para o CXbd e de 14,90 Mg ha-1 para o LVdf. As perdas médias anuais de água foram 369 mm para o CXbd e 113 mm para o LVdf, representando, respectivamente, 28,67% e 8,78% do total precipitado....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Erosão hídrica; Enxurrada; Solos rasos; Solos intemperizados.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2005001200010

Distribuição e potencial erosivo das chuvas no Estado do Tocantins
Provedor de dados: 86
Autores: Viola,Marcelo Ribeiro; Avanzi,Junior Cesar; Mello,Carlos Rogério de; Lima,Saulo de Oliveira; Alves,Marcos Vinicius Giongo.
O objetivo deste trabalho foi determinar os valores de erosividade e gerar os mapas da distribuição espaço-temporal das chuvas no Estado do Tocantins. Analisaram-se séries históricas pluviométricas de 97 postos pluviométricos, compreendendo o período de 1985 a 2009. A erosividade foi estimada por meio de equações nas quais a variável independente foi a precipitação média mensal ou o coeficiente de chuva de Fournier (Rc). A geoestatística foi aplicada para o mapeamento da erosividade tanto na escala mensal quanto na anual. A erosividade anual apresentou valores entre 6.599 e 14.000 MJ mm ha-1 h-1, com auge em dezembro, quando atingiu valores de até 2.800 MJ mm ha-1 h-1 por mês. De maio a setembro, a erosividade apresentou valores inferiores ao crítico, tido...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conservação de solo e água; Índice de erosividade da chuva; Erosão hídrica; Geoestatística; Mapeamento.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2014000200125

Aggregate stability in soils cultivated with eucalyptus
Provedor de dados: 86
Autores: Avanzi,Junior Cesar; Norton,Lloyd Darrell; Silva,Marx Leandro Naves; Curi,Nilton; Oliveira,Anna Hoffmann; Silva,Mayesse Aparecida da.
The objective of this work was to evaluate the aggregate stability of tropical soils under eucalyptus plantation and native vegetation, and assess the relationships between aggregate stability and some soil chemical and physical properties. Argisols, Cambisol, Latosols and Plinthosol within three eucalyptus-cultivated regions, in the states of Espírito Santo, Rio Grande do Sul and Minas Gerais, Brazil, were studied. For each region, soils under native vegetation were compared to those under minimum tillage with eucalyptus cultivation. The aggregate stability was measured using the high-energy moisture characteristic (HEMC) technique, i.e., the moisture release curve at very low suctions. This method compares the resistance of aggregates to slaking on a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Eucalyptus sp.; High-energy moisture characteristic curve; Forest systems; Tropical soils.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2011000100012

Modeling of the Rainfall and R-Factor for Tocantins State, Brazil
Provedor de dados: 90
Autores: Avanzi,Junior Cesar; Viola,Marcelo Ribeiro; Mello,Carlos Rogério de; Giongo,Marcos Vinicius; Pontes,Lucas Machado.
ABSTRACT The state of Tocantins is inserted in the new Brazilian agricultural frontier and has shown enormous potential for expansion of the agricultural lands. However, there is a lack of more elaborate scientific information for better planning and guide agricultural activities, especially regarding the soil and water conservation. Tocantins has a relevant rainfall spatial variability and, consequently, rainfall erosivity. Thus, this work aimed to develop models to estimate the mean monthly and annual rainfall and means rainfall erosivity factor (R-factor) of the Universal Soil Loss Equation (USLE) for the state of Tocantins. For that, 97 historical series of daily rainfall were studied, considering a standard period of 25 years (1985-2009). The fitting...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Water erosion; Geostatistics; Regression-kriging; Soil and water conservation; Mapping.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832019000100524

Assessment of soil erosion in olive orchards (Olea europaea L.) under cover crops management systems in the tropical region of Brazil
Provedor de dados: 90
Autores: Beniaich,Adnane; Silva,Marx Leandro Naves; Guimarães,Danielle Vieira; Bispo,Diêgo Faustolo Alves; Avanzi,Junior Cesar; Curi,Nilton; Pio,Rafael; Dondeyne,Stefaan.
ABSTRACT In the tropics, water erosion is one of the most important factors leading to the degradation and deterioration of agricultural land. Olive orchards have a low canopy coverage, especially during the first years after planting, due to the low density of olive trees. Given the fast expansion of olive orchards in Brazil, this study aimed to evaluate the effect of cover vegetation on soil and water losses under natural rainfall. In addition, it was assessed the crop performance and the vegetation cover index in different management systems in olive orchards. The study was carried out in soil erosion plots, where water and sediment were sampled and measured over two crops season, under the following treatments: in the first season, bare soil with olive...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil conservation; Soil loss; Land degradation; Runoff; Olive cultivation.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832020000100503

Rainfall erosivity and rainfall return period in the experimental watershed of Aracruz, in the coastal plain of Espirito Santo, Brazil
Provedor de dados: 90
Autores: Martins,Sérgio Gualberto; Avanzi,Junior Cesar; Silva,Marx Leandro Naves; Curi,Nilton; Norton,Lloyd Darrell; Fonseca,Sebastião.
Knowledge on the factors influencing water erosion is fundamental for the choice of the best land use practices. Rainfall, expressed by rainfall erosivity, is one of the most important factors of water erosion. The objective of this study was to determine rainfall erosivity and the return period of rainfall in the Coastal Plains region, near Aracruz, a town in the state of Espírito Santo, Brazil, based on available data. Rainfall erosivity was calculated based on historic rainfall data, collected from January 1998 to July 2004 at 5 min intervals, by automatic weather stations of the Aracruz Cellulose S.A company. A linear regression with individual rainfall and erosivity data was fit to obtain an equation that allowed data extrapolation to calculate...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Kinetic energy; R-factor; USLE; Recurrence interval; Probability of occurrence.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000300042

Soil losses from typic cambisols and red latosol as related to three erosive rainfall patterns
Provedor de dados: 90
Autores: Aquino,Regimeire Freitas; Silva,Marx Leandro Naves; Freitas,Diego Antonio França de; Curi,Nilton; Avanzi,Junior Cesar.
Rainfall erosivity is one of the main factors related to water erosion in the tropics. This work focused on relating soil loss from a typic dystrophic Tb Haplic Cambisol (CXbd) and a typic dystrophic Red Latosol (LVdf) to different patterns of natural erosive rainfall. The experimental plots of approximately 26 m² (3 x 8.67 m) consisted of a CXbd area with a 0.15 m m-1 slope and a LVdf area with 0.12 m m-1 slope, both delimited by galvanized plates. Drainpipes were installed at the lower part of these plots to collect runoff, interconnected with a Geib or multislot divisor. To calculate erosivity (EI30), rainfall data, recorded continuously at a weather station in Lavras, were used. The data of erosive rainfall events were measured (10 mm precipitation...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rainfall erosivity; Water erosion; Kinetic energy; Soil erodibility.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000100022

Potencial de sequestro de carbono em diferentes biomas do Brasil
Provedor de dados: 90
Autores: Carvalho,João Luis Nunes; Avanzi,Junior Cesar; Silva,Marx Leandro Naves; Mello,Carlos Rogério de; Cerri,Carlos Eduardo Pellegrino.
O solo é um importante compartimento de C e exerce papel fundamental sobre a emissão de gases do efeito estufa e consequentes mudanças climáticas globais. Mudanças no uso e manejo do solo podem causar tanto efeito negativo como positivo no que se refere à emissão de gases de efeito estufa para a atmosfera. Entretanto, atualmente tem sido constatada a intensificação do aquecimento global, causado pelo aumento das emissões dos gases responsáveis pelo efeito estufa, oriundos principalmente da queima de combustíveis fósseis, do desmatamento e do uso inadequado do solo para agricultura. O uso e manejo inadequado do solo, além de contribuir para o efeito estufa, ainda traz problemas relacionados à sua sustentabilidade devido à degradação da matéria orgânica do...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Uso da terra; Emissão de gases do efeito estufa; Estoque de carbono no solo; Aquecimento global.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000200001

Erosividade da chuva e erodibilidade de Cambissolo e Latossolo na região de Lavras, sul de Minas Gerais
Provedor de dados: 90
Autores: Silva,Antonio Marcos da; Silva,Marx Leandro Naves; Curi,Nilton; Avanzi,Junior Cesar; Ferreira,Mozart Martins.
No Brasil, ainda são relativamente poucos os estudos envolvendo erodibilidade do solo, principalmente Cambissolos, dada a morosidade na obtenção dos resultados de experimentos com chuva natural. O conhecimento dos índices de erosividade e de erodibilidade é importante para o planejamento conservacionista, contribuindo para a sustentabilidade dos solos. Este estudo teve como objetivos determinar a erosividade da chuva e a erodibilidade de Cambissolo Háplico Tb distrófico típico e Latossolo Vermelho distroférrico típico, sob chuva natural, em Lavras (MG), no período de 1998 a 2002. Os dados de precipitação pluviométrica foram obtidos na Estação Climatológica Principal de Lavras, localizada no campus da Universidade Federal de Lavras, próxima das unidades...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Erosão hídrica; Fator K; Energia cinética; Horizonte B incipiente; Horizonte B latossólico.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832009000600029

Aggregate stability by the "high energy moisture characteristic" method in an oxisol under differentiated management
Provedor de dados: 90
Autores: 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

Morphological adaptations of signal grass in response to liming and cutting severities
Provedor de dados: 124
Autores: Pereira,Lilian Elgalise Techio; Passos,Bruna Scalia de Araújo; Herling,Valdo Rodrigues; Luz,Pedro Henrique de Cerqueira; Avanzi,Junior Cesar.
ABSTRACT Changes in morphological composition and in the plant population were evaluated during late spring, summer and autumn, in swards of Brachiaria decumbens cv. Basilisk in response to liming (C0.0, without liming; C0.7, limestone amount equivalent to 0.7 ton ha-1; and C1.0, limestone amount equivalent to 1.0 ton ha-1), which were subjected to severe or lenient cutting (40 or 60% of the pre-cutting height, respectively). Increased limestone doses did not result in higher herbage mass (HM), leaf area index (LAI) or proportion of leaves (%L) in the pre-harvest. However, lower proportion of dead material was registered in C0.7 treatment. The treatments C0.0 e C0.7 had higher %L during late spring and summer when associated to severe cutting regimes...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil acidity; Canopy height; Management strategies.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000400673

Adaptation and application of the erosion potential method for tropical soils1
Provedor de dados: 124
Autores: Sakuno,Natanael Rodolfo Ribeiro; Guiçardi,Augusto Cesar Ferreira; Spalevic,Velibor; Avanzi,Junior Cesar; Silva,Marx Leandro Naves; Mincato,Ronaldo Luiz.
ABSTRACT The water erosion process has a considerable negative effect on tropical soils, causes soil losses from arable land and reduces the capacity to support surrounding ecosystems. Estimating soil losses caused by water erosion is fundamental for evaluating the impacts of various production systems. Therefore, improving soil loss estimates via the adaptation of models for different edaphoclimatic environments is necessary for estimating local geographic and climatic differences. This study aimed to adapt, apply and evaluate the potentialities of the Potential Erosion Method for Latosols of the Hydrographic Subbasin of Caçús Stream, southern Minas Gerais State. Geological, topographic, pedological, climatic and land use and occupation data were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Modeling of water erosion; RUSLE; Tropical soils.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000100409

Estimates of soil losses by the erosion potential method in tropical latosols
Provedor de dados: 64
Autores: Lense,Guilherme Henrique Expedito; Parreiras,Taya Cristo; Moreira,Rodrigo Santos; Avanzi,Junior Cesar; Mincato,Ronaldo Luiz.
ABSTRACT Water erosion is one of the main problems faced in coffee cultivation, as it promotes environmental degradation and crop yield decrease. Erosion estimates support the planning of conservation management practices and allowing determining the rates of soil losses. Thus, the objective of this paper was to estimate the soil loss by water erosion using the Erosion Potential Method in a sub-basin predominantly covered by coffee cultivation and then to compare the results with the Soil Loss Tolerance limits. The study area is the Coroado Stream Sub-basin, located at Alfenas Municipality, south of Minas Gerais, Brazil. The sub-basin presented an Erosion Coefficient of 0.272, indicating a predominance of low-intensity erosion. The total soil loss estimate...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil conservation; Water erosion; Modeling.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542019000100225

Índice de cobertura vegetal pela cultura do milho no período de chuvas intensas no sul de Minas Gerais
Provedor de dados: 64
Autores: Souza,Fabiana Silva de; Silva,Marx Leandro Naves; Curi,Nilton; Avanzi,Junior Cesar; Von Pinho,Renzo Garcia; Lima,Gabriela Camargos.
A cobertura vegetal é a defesa natural do solo contra a erosão hídrica. Nos modelos de estimativas de perdas de solo, o efeito da cobertura vegetal na interceptação da energia cinética da chuva é a variável chave na modelagem do processo erosivo. Assim sendo, objetivou-se avaliar a eficiência da cobertura vegetal, proporcionada pela cultura do milho, e suas relações com os atributos fitotécnicos desta cultura para alguns híbridos. O estudo foi realizado no campo demonstrativo de híbridos de milho da Universidade Federal de Lavras, localizada no município de Lavras, MG. Para determinação da cobertura vegetal utilizou-se um aparato que consiste em uma estrutura horizontal, contendo orifícios para visualização dos pontos com cobertura e sem cobertura vegetal,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Erosão hídrica; Enxurrada; Conservação do solo; Escoamento superficial.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542010000200011

Water erosion in soils under eucalyptus forest as affected by development stages and management systems
Provedor de dados: 64
Autores: Oliveira,Anna Hoffmann; Silva,Marx Leandro Naves; Curi,Nilton; Avanzi,Junior Cesar; Klinke Neto,Gustavo; Araújo,Elias Frank.
The constant increasing of eucalyptus forest areas in Brazil requires an accurate monitoring of water erosion. The present study aimed to evaluate soil, nutrients and organic carbon losses occasioned by water erosion in eucalyptus planted forests (EPF) at different development stages (2, 3 and 7 years old). Soil erosion sediments were measured and sampled from standard erosion plots installed on Red Argisol-RA (Ultisol) and Haplic Cambisol-HC (Inceptisol). Soil loss decreased as the age of plants increased; at the beginning of plant development, the canopy barely covered the soil surface, exposing the soil to higher erosion at young EPF plantations. Furrow planting system was used in the Red Argisol area and caused higher soil losses (1.1 to 6.2 Mg ha-1...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil loss; Afforestation; Conservation system.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542013000200007

Estimation of sediments produced in a subbasin using the Normalized Difference Vegetation Index
Provedor de dados: 64
Autores: Lense,Guilherme Henrique Expedito; Moreira,Rodrigo Santos; Bócoli,Fernanda Almeida; Avanzi,Junior Cesar; Teodoro,Alexandre Elias de Miranda; Mincato,Ronaldo Luiz.
ABSTRACT Among the parameters considered by the Revised Universal Soil Loss Equation (RUSLE), the soil cover and management factor (C) is the main human influenced factor affecting the estimation of water erosion, and one of the most sensitive to spatiotemporal variations. Consequently, this study aims to compare the efficiency of C factor estimates obtained from the literature for each land-use class (Clit) and by calculation based on the Normalized Difference Vegetation Index (CNDVI). We test the hypothesis that soil loss estimates based on CNDVI approach are more accurate than those based on Clit. Water erosion was estimated based on soil morphological, physical, and chemical properties in addition to climate, relief, management practices, and land use...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil conservation; Water erosion; Modeling; RUSLE.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542020000100214

Spatial variability of the rainfall erosivity in southern region of Minas Gerais state, Brazil
Provedor de dados: 64
Autores: Aquino,Regimeire Freitas; Silva,Marx Leandro Naves; Freitas,Diego Antonio França de; Curi,Nilton; Mello,Carlos Rogério de; Avanzi,Junior Cesar.
Rainfall erosivity and its spatial variability were studied for 54 pluviometric stations in Southern Minas Gerais State (48º00' - 44º00'W; 23º50' - 20º00'S), aiming to plan the land-use strategies. Therefore, erosivity factor was determined for the pluviometric stations, using long-term rainfall data sets obtained along with the Brazilian National Water Agency- ANA, which varied from 15 to 40 years. The monthly and annual erosivity indexes were generated using Fournier equation for Lavras, MG and the spatial distribution of rainfall erosivity was studied on the basis of geostatistical approaches considering only the distance which separates them, developing the isotropic experimental semivariogram. The semivariogram adjustment was done based on the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Erosive potential; Soil sustainability; Kriging.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000500006

Erosão hídrica em latossolo vermelho sob diversos sistemas de manejo do cafeeiro no Sul de Minas Gerais
Provedor de dados: 64
Autores: Carvalho,Ricardo; Silva,Marx Leandro Naves; Avanzi,Junior Cesar; Curi,Nilton; Souza,Fabiana Silva de.
A erosão hídrica contribui para a redução da sustentabilidade dos sistemas agrícolas. O presente estudo avaliou, sob condições de chuva natural, as perdas de solo, água, nutrientes e matéria orgânica em um Latossolo Vermelho distroférrico típico, com 12 % de declividade, localizado na região de Lavras (MG). O trabalho foi conduzido em parcelas experimentais de perdas de solo. Os sistemas de manejo estudados foram: café sob cultivo convencional, com capina manual (CCC); cultivo convencional, com roçado (CCR); cultivo convencional, com utilização de herbicida (CCH); cultivo orgânico, com capina manual (COC); cultivo orgânico, com roçado (COR); e como referência parcela com solo descoberto (SD). Nos sistemas de manejo em que foi mantida a cobertura da...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Perda de solo; Perda de água; Perda de nutrientes; Coffea arabica.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542007000600012

Spatial distribution of water erosion risk in a watershed with eucalyptus and Atlantic Forest
Provedor de dados: 64
Autores: Avanzi,Junior Cesar; Silva,Marx Leandro Naves; Curi,Nilton; Norton,Lloyd Darrell; Beskow,Samuel; Martins,Sérgio Gualberto.
The process of water erosion occurs in watersheds throughout the world and it is strongly affected by anthropogenic influences. Thus, the knowledge of these processes is extremely necessary for planning of conservation efforts. This study was performed in an experimental forested watershed in order to predict the average potential annual soil loss by water erosion using the Universal Soil Loss Equation (USLE) and a Geographic Information System (GIS), and then compared with soil loss tolerance. All the USLE factors were generated in a distributed approach employing a GIS tool. The layers were multiplied in the GIS framework in order to predict soil erosion rates. Results showed that the average soil loss was 6.2 Mg ha-1 yr-1. Relative to soil loss...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Forest systems; Soil losses; USLE; GIS; Coastal plain.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542013000500006

Comparação de distribuições de probabilidade e estimativa da precipitação provável para região de Barbacena, MG
Provedor de dados: 64
Autores: Ribeiro,Bruno Teixeira; Avanzi,Junior Cesar; Mello,Carlos Rogério de; Lima,José Maria de; Silva,Marx Leandro Naves.
Estudos probabilísticos envolvendo variáveis climáticas são de extrema importância para as atividades da agropecuária, construção civil, turismo, transporte, dentre outros. Visando contribuir para o planejamento da agricultura irrigada, este trabalho teve como objetivos comparar distribuições de probabilidade ajustadas às séries históricas decendiais e mensais, e estimar as precipitações prováveis para o município de Barbacena, MG. Foram estudados os meses de dezembro, janeiro e fevereiro, no período de 1942 a 2003, constituindo-se séries históricas com 62 anos de observações. As lâminas diárias foram totalizadas em períodos mensais e decendiais, sendo aplicadas as distribuições log-Normal 2 parâmetros, log-Normal 3 parâmetros e Gama. Para avaliar a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Distribuição Gama; Irrigação; Planejamento agrícola; Chuva.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542007000500004

Water erosion risk prediction in eucalyptus plantations
Provedor de dados: 64
Autores: Silva,Mayesse Aparecida da; Silva,Marx Leandro Naves; Curi,Nilton; Oliveira,Anna Hoffmann; Avanzi,Junior Cesar; Norton,Lloyd Darrell.
Eucalyptus plantations are normally found in vulnerable ecosystems such as steep slope, soil with low natural fertility and lands that were degraded by agriculture. The objective of this study was to obtain Universal Soil Loss Equation (USLE) factors and use them to estimate water erosion risk in regions with eucalyptus planted. The USLE factors were obtained in field plots under natural rainfall in the Rio Doce Basin, MG, Brazil, and the model applied to assess erosion risk using USLE in a Geographic Information System. The study area showed rainfall-runoff erosivity values from 10,721 to 10,642 MJ mm ha-1 h-1 yr-1. Some soils (Latosols) had very low erodibility values (2.0 x 10-4 and 1.0 x 10-4t h MJ-1 mm-1), the topographic factor ranged from 0.03 to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: USLE factors; Soil loss tolerance; Conservation practices; Forest management.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000200007