Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: 

RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 115
Primeira ... 123456 ... Última
Imagem não selecionada

Imprime registro no formato completo
Resistência à penetração em um Latossolo Vermelho distrófico em fase inicial de estabelecimento de sistemas intensivos de cultivo de grãos. Repositório Alice
GUIMARAES, E. V.; SILVA, B. M.; BATISTA, A. M.; MELO, M. L. A. de; ARAUJO, G. S. S.; MOURA, M. S. de; MOTA, P. K.; BORGHI, E..
Tipo: Parte de livro Palavras-chave: Compactação; Milho; Prensagem; Física do solo; Soil physics; Soil compaction.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1055702
Imagem não selecionada

Imprime registro no formato completo
Root abundance of maize in conventionally-tilled and zero-tilled soils of Argentina Rev. Bras. Ciênc. Solo
Taboada,Miguel Angel; Alvarez,Carina Rosa.
Maize root growth is negatively affected by compacted layers in the surface (e.g. agricultural traffic) and subsoil layers (e.g. claypans). Both kinds of soil mechanical impedances often coexist in maize fields, but the combined effects on root growth have seldom been studied. Soil physical properties and maize root abundance were determined in three different soils of the Rolling Pampa of Argentina, in conventionally-tilled (CT) and zero-tilled (ZT) fields cultivated with maize. In the soil with a light Bt horizon (loamy Typic Argiudoll, Chivilcoy site), induced plough pans were detected in CT plots at a depth of 0-0.12 m through significant increases in bulk density (1.15 to 1.27 Mg m-3) and cone (tip angle of 60 º) penetrometer resistance (7.18 to 9.37...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Zero tillage; Conventional tillage; Soil compaction; Root growth.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832008000200031
Imagem não selecionada

Imprime registro no formato completo
Root growth, water potential, nutrient uptake and grain yield of upland rice as affected by soil moisture deficit and compaction International Rice Research Institute
Tanguilig, Valerio Calica.
208 l. : ill. Thesis (Ph.D.) -- University of the Philippines at Los Baños
Tipo: Thesis Palavras-chave: Rice; Plant physiology; Root growth; Water potential; Nutrient uptake; Grain yield; Soil compaction; Soil water deficit; Highlands; Upland rice.
Ano: 1987 URL: http://hdl.handle.net/123456789/1261
Imagem não selecionada

Imprime registro no formato completo
Sistema plantio direto de cana-de-açúcar no Cerrado. Infoteca-e
SANTOS JUNIOR, J. de D. G. dos; SA, M. A. C. de; OLIVEIRA, C. M. de; FRANZ, C. A. B.; REIN, T. A.; SOUSA, D. M. G. de.
bitstream/item/131276/1/cirtec-30.pdf
Tipo: Circular Técnica (INFOTECA-E) Palavras-chave: Goiás; Cana-de-açúcar; Agroenergia; Brasil; Savanna; No-tillage system; Stalk yield.; Plantio direto; Produtividade; Colheita mecânica; Compactação do solo; Cerrado; Saccharum Officinarum.; Brazil; Bioenergy; Soil compaction; Sugarcane..
Ano: 2015 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1026353
Imagem não selecionada

Imprime registro no formato completo
Soil bulk density and biomass partitioning of Brachiaria decumbens in a silvopastoral system Scientia Agricola
Paciullo,Domingos Sávio Campos; Castro,Carlos Renato Tavares de; Gomide,Carlos Augusto de Miranda; Fernandes,Priscila Beligoli; Rocha,Wadson Sebastião Duarte da; Müller,Marcelo Dias; Rossiello,Roberto Oscar Pereyra.
Shade in silvopastoral systems improves the thermal comfort of animals, but it may also affect the pasture productivity and can contribute to soil compaction in the shaded areas due to the increase in the number of animals looking for comfort. The effect of grazing at various distances from tree rows (under the tree canopy, at 6 and at 12 m away from the trees) on the soil bulk density and on the aerial and root biomass of Brachiaria decumbens was evaluated in both the dry and the rainy seasons. The study was carried out on an Orthic Ferralsol in a randomized block design with two replications. Tree rows were composed of Eucalyptus grandis and Acacia mangium species, and the paddocks were submitted to a rotational stocking management, using Holstein (Bos...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Forage mass; Root mass; Soil compaction; Shading; Shoot/root ratio.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000500014
Imagem não selecionada

Imprime registro no formato completo
Soil compaction impacts soybean root growth in an Oxisol from subtropical Brazil Repositório Alice
MORAES, M. T. de; DEBIASI, H.; FRANCHINI, J. C.; MASTROBERTI, A. A.; LEVIEN, R.; LEITNER, D.; SCHNEPF, A..
Tipo: Artigo de periódico Palavras-chave: Resistência a Seca; Energia Mecânica; Compactação do Solo; Soja; Enraizamento; Soil compaction; Soybeans; Root growth; Mechanical stress; Water stress.
Ano: 2020 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1129644
Imagem não selecionada

Imprime registro no formato completo
Soil penetration resistance in a rhodic eutrudox affected by machinery traffic and soil water content REA
Moraes,Moacir T. de; Debiasi,Henrique; Franchini,Julio C.; Silva,Vanderlei R. da.
Soil compaction caused by machinery traffic reduces crop yields. This study aimed to evaluate the effects of intensive traffic, and the soil water content, on the soil penetration resistance (PR) of a Rhodic Eutrudox (Distroferric Red Latosol, Brazilian Classification), managed under no-tillage (NT). The experiment consisted of six treatments: NT with recent chiseling, NT without additional compaction, and NT with additional compaction by 4, 8, 10 and 20 passes of a harvester with a weight of 100 kN (70 kN on the front axle). Undisturbed soil samples were collected at 5.5-10.5 cm and 13.5-18.5 cm depth to quantify the soil bulk density (BD). The PR was assessed in four periods, using an impact penetrometer, inserted in the soil to a depth of 46 cm. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil layers with mechanical impedance; No-tillage; Soil compaction; Soil consistency; Soil profile.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000400014
Imagem não selecionada

Imprime registro no formato completo
Soil penetration resistance mapping quality: effect of the number of subsamples Agronomy
Pias, Osmar Henrique de Castro; Cherubin, Maurício Roberto; Basso, Claudir José; Santi, Antônio Luis; Molin, José Paulo; Bayer, Cimélio.
There is no consensus in the literature regarding how many subsamples are needed to perform accurate on-farm soil penetration resistance (SPR) mapping. Therefore, the objective of this study was to define the number of subsamples per sampling point needed to quantify the SPR. The experiment was performed in a 4.7 ha area and employed a 50 × 50 m grid system (18 sampling points). The SPR was evaluated using a digital penetrometer in two different years with 1, 2, 3, 4, 5, 6, 9, 12, and 15 subsamples per sampling point. The SPR maps produced with increasing numbers of subsamples were compared to the reference maps (15 subsamples) using the relative deviation coefficient and Pearson´s linear correlation. A reduction in the number of subsamples promoted an...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil compaction; Sampling protocol; Precision agriculture; Microvariability. soil compaction; Sampling protocol; Precision agriculture; Microvariability Física do solo.
Ano: 2018 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/34989
Imagem não selecionada

Imprime registro no formato completo
Soil penetration resistance mapping quality: effect of the number of subsamples Agronomy
Pias, Osmar Henrique de Castro; Cherubin, Maurício Roberto; Basso, Claudir José; Santi, Antônio Luis; Molin, José Paulo; Bayer, Cimélio.
There is no consensus in the literature regarding how many subsamples are needed to perform accurate on-farm soil penetration resistance (SPR) mapping. Therefore, the objective of this study was to define the number of subsamples per sampling point needed to quantify the SPR. The experiment was performed in a 4.7 ha area and employed a 50 × 50 m grid system (18 sampling points). The SPR was evaluated using a digital penetrometer in two different years with 1, 2, 3, 4, 5, 6, 9, 12, and 15 subsamples per sampling point. The SPR maps produced with increasing numbers of subsamples were compared to the reference maps (15 subsamples) using the relative deviation coefficient and Pearson´s linear correlation. A reduction in the number of subsamples promoted an...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil compaction; Sampling protocol; Precision agriculture; Microvariability.; Soil compaction; Sampling protocol; Precision agriculture; Microvariability; Física do solo.
Ano: 2018 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/34989
Imagem não selecionada

Imprime registro no formato completo
Soil physical and biological properties in an integrated crop-livestock system in the Brazilian Cerrado PAB
Bonetti,João de Andrade; Paulino,Helder Barbosa; Souza,Edicarlos Damacena de; Carneiro,Marco Aurélio Carbone; Caetano,Jeander Oliveira.
Abstract: The objective of this work was to evaluate the soil physical and biological properties in an integrated crop-livestock system (ICLS), with or without cattle grazing, in different seasons. The experiment was carried out in the Cerrado biome, in Brazil, in a Rhodic Eutrudox. The treatments consisted of grazing areas (Urochloa ruziziensis) at 0.25, 0.35, and 0.45 m heights (with soybean cultivation after grazing) and of nongrazed areas. The ICLS had no negative effects on soil bulk density, total porosity, macroporosity, and microporosity. After ICLS implementation, the values of soil bulk density decreased, and those of soil macroporosity increased, in the grazed and nongrazed areas. However, after three years, bulk density and macroporosity were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Animal traffic; No-tillage system; Soil aggregation; Soil compaction; Soil microbial biomass; Soil quality.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018001101239
Imagem não selecionada

Imprime registro no formato completo
Soil physical attributes in integrated bean and sheep system under nitrogen levels Rev. Ciênc. Agron.
Andreolla,Veruschka Rocha Medeiros; Moraes,Aníbal de; Bonini,Andreia Kusumota; Deiss,Leonardo; Sandini,Itacir Eloi.
Integrated crop-livestock systems (ICLS) can promote higher grain and meat/milk yield as well as reduce soil degradation risks. Thus, this study aimed to evaluate the influence of grazing sheep with moderate intensity and nitrogen doses on soil physical attributes, and bean crop yield (Phaseolus vulgaris Lam.) under rotation with summer corn crop (Zea mays Lam.) and winter pasture with oats (Avena sativa Lam) and ryegrass (Lolium multiflorum Lam.) The experimental design was completely randomized blocks with split-plot; the plots were nitrogen doses and the split-plots were grazing presence or absence. The treatments were nitrogen doses of 0, 75, 150 and 225 kg ha-1 applied on ryegrass and white oat pasture in winter followed by bean crop. Soil density,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Integrated crop-livestock system; Soil compaction; Yield.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000500008
Imagem não selecionada

Imprime registro no formato completo
Soil physical properties and grain yield influenced by cover crops and crop rotation. Repositório Alice
FORTE, C. T.; BEUTLER, A. N.; GQLON, L.; CASTOLDI, C. T.; WINTER, F. L.; HOLZ, C. M.; BIANCHESSI, F.; CONCENCO, G.; CHECHI, L.; FERREIRA, M. M.; ANDRES, A.; BURG, G. M..
Tipo: Artigo de periódico Palavras-chave: No Till; Dry Matter; Intercropped; Tillage; Bulk density; Soil compaction.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1095163
Imagem não selecionada

Imprime registro no formato completo
Soil resistance to penetration in cotton rows and interrows AGRIAMBI
Baio,Fábio H. R.; Scarpin,Igor M.; Roque,Cassiano G.; Neves,Danilo C..
ABSTRACT The soil physical quality is one of the most determinant factors for the development of any crop. This study aimed to assess the sample representativeness in soil resistance to penetration mappings taken in rows and interrows of the cotton crop, under two soil moisture conditions. Thirty control points were sampled in a cotton field of 91 ha. Soil resistance to penetration and soil moisture were measured at these georeferenced points. Regardless of soil moisture, the sampling position of soil resistance to penetration is indifferent (row, interrow, or in both positions) when the analysed depth is greater than 0.20 m in the cotton crop. The decrease of soil moisture causes the increment of soil resistance to penetration, regardless of the sampling...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cone index; Penetrometer; Soil compaction.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000600433
Imagem não selecionada

Imprime registro no formato completo
Soil shear strength under non-irrigated and irrigated short duration grazing systems Rev. Bras. Ciênc. Solo
Carvalho,Rita de Cássia Ribeiro; Rocha,Wellington Willian; Pinto,José Cardoso; Pires,Bruno da Silva; Dias Junior,Moacir de Souza; Nunes,Ayeska Hubner Braga.
Pasture productivity can drop due to soil compaction caused by animal trampling. Physical and mechanical alterations are therefore extremely important indicators for pasture management. The objective of this research was to: draw and evaluate the Mohr failure line of a Red Yellow Latossol under different pasture cycles and natural forest; calculate apparent cohesion; observe possible physical alterations in this soil; and propose a correction factor for stocking rates based on shear strength properties. This study was conducted between March/2006 and March/2007 on the Experimental Farm of Fundação de Ensino Superior de Passos, in Passos, state of Minas Gerais. The total study area covered 6 ha, of which 2 ha were irrigated pasture, 2 ha non-irrigated...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil compaction; Pasture; Animal trampling.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000300004
Imagem não selecionada

Imprime registro no formato completo
Soil structural quality degradation by the increase in grazing intensity in integrated crop-livestock system Bragantia
Auler,André Carlos; Galetto,Shivelly Los; Hennipman,Fabrício Siqueira; Guntzel,Eduardo Daniel; Giarola,Neyde Fabíola; Fonseca,Adriel Ferreira da.
ABSTRACT The intensification of soil use, as in integrated croplivestock system (ICLS), might promote soil structural degradation. A field method to evaluate the soil structural quality is the Visual Evaluation of Soil Structure (VESS). Studies on the application of this method to ICLS are few. This work aimed to evaluate the structural quality of a Dystrudept under ICLS and different grazing intensities through VESS. Thus, the soil structure was evaluated in light grazing (LG) and heavy grazing (HG) in comparison to a neighboring native forest (NF) as reference area. After the grazing period, 10 trenches were dug in each area to collect soil monoliths. The identification of structural differences and the attribution of visual scores were carried out...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cattle trampling; Soil compaction; Visual Evaluation of Soil Structure.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052017000400550
Imagem não selecionada

Imprime registro no formato completo
Soil water retention and s index after crop rotation and chiseling Rev. Bras. Ciênc. Solo
Calonego,Juliano Carlos; Rosolem,Ciro Antonio.
Soil compaction can be minimized either mechanically or biologically, using plant species with vigorous root systems. An experiment was carried out with soybean (Glycine max) in rotation with triticale (X Triticosecale) and sunflower (Helianthus annuus) in fall-winter associated with pearl millet (Pennisetum glaucum), grain sorghum (Sorghum bicolor) or sunn hemp (Crotalaria juncea) in spring. Crop rotation under no-till was compared with mechanical chiseling. The experiment was carried out in Botucatu, São Paulo State, Brazil. Soil quality was estimated using the S index and soil water retention curves (in the layers of 0-0.05, 0.075-0.125, 0.15-0.20, 0.275-0.325, and 0.475-0.525 m deep). Crop rotation and chiseling improved soil quality, increasing the S...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cropping systems; Soil compaction; Tillage; Soil quality.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000600009
Imagem não selecionada

Imprime registro no formato completo
SOYBEAN AGRONOMIC PERFORMANCE AND SOIL PHYSICAL ATTRIBUTES UNDER TRACTOR TRAFFIC INTENSITIES REA
Arcoverde,Sálvio N. S.; Souza,Cristiano M. A. de; Rafull,Leidy Z. L.; Cortez,Jorge W.; Orlando,Roberto C..
ABSTRACT Machinery traffic intensification has been recurrent in intensive agriculture in annual crops, which may lead to structural soil degradation and, consequently, a reduction of its productive capacity. Therefore, this study aimed to assess the influence of tractor traffic intensification on soil physical attributes and soybean yield components. The study was performed in an Oxisol under no-tillage for 10 years, using a randomized block design with five tractor traffic intensities (0, 2, 4, 6, 8, and 12 passes) and five replications. Density, porosity, macroporosity, microporosity, and penetration resistance were assessed in the soil and stem diameter, number of pods per plant, number of grains per pod, grain weight per plant, thousand-grain weight,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil compaction; Yield components; Shoot; Soil penetration resistance; Machinery traffic.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000100113
Imagem não selecionada

Imprime registro no formato completo
Spatial patterns of preconsolidation pressure and soil moisture along transects in two directions under coffee Rev. Bras. Ciênc. Solo
Gontijo,Ivoney; Souza Dias Junior,Moacir de; Guimarães,Paulo Tácito Gontijo; Oliveira,Marcelo Silva de; Ajayi,Ayodele Ebenezer.
Information on the spatial structure of soil physical and structural properties is needed to evaluate the soil quality. The purpose of this study was to investigate the spatial behavior of preconsolidation pressure and soil moisture in six transects, three selected along and three across coffee rows, at three different sites under different tillage management systems. The study was carried out on a farm, in Patrocinio, state of Minas Gerais, in the Southeast of Brazil (18 º 59 ' 15 '' S; 46 º 56 ' 47 '' W; 934 m asl). The soil type is a typic dystrophic Red Latosol (Acrustox) and consists of 780 g kg-1 clay; 110 g kg-1 silt and 110 g kg-1 sand, with an average slope of 3 %. Undisturbed soil cores were sampled at a depth of 0.10-0.13 m, at three different...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Semivariogram; Soil compaction; Geostatistics; Soil sampling.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000400012
Imagem não selecionada

Imprime registro no formato completo
Spatial variability of mechanical resistance to penetration evaluated with mobile unit on haplic vertisol cultivated with mango REA
Cortez,Jorge W.; Lopes,Hélio L.; Coelho,Daniela S.; Arcoverde,Sálvio N. S..
Since the advent of mechanized farming and intensive use of agricultural machinery and implements on the properties, the soil began to receive greater load of machinery traffic, which can cause increased soil compaction. The aim of this study was to evaluate the spatial variability of soil mechanical resistance to penetration (RP) in the layers of 0.00-0.10, 0.10-0.20, 0.20-0.30 and 0.30-0.40m, using geostatistics in an area cultivated with mango in Haplic Vertisol of the northeastern semi-arid, with mobile unit equipped with electronic penetrometer. The RP data was collected in 56 points from an area of 3 ha, and random soil samples were collected to determine the soil moisture and texture. For RP data analysis we used descriptive statistics and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil compaction; Machinery traffic; Agricultural mechanization.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000200006
Imagem não selecionada

Imprime registro no formato completo
Spatial variability of soil penetration resistance influenced by season of sampling Bragantia
Bonnin,Juan José; Mirás-Avalos,José Manuel; Lanças,Kléber Pereira; González,Antonio Paz; Vieira,Sidney Rosa.
The aim of this work was to analyze the spatial distribution of soil compaction and the influence of soil water content on the resistance to penetration. The latter variable was described by the cone index. The soil at the study site was a Nitisol and the cone index data were obtained using a penetrometer. Soil resistance was assessed at 5 different depths, i.e. 0-10 cm, 10-20 cm, 20-30 cm, 30-40 cm and deeper than 40 cm, whereas soil water content was measured at 0-20 cm and 20-40 cm. Soil water conditions varied during the different samplings. Coefficients of variation for cone index ranged from 16.5% to 45.8% while those for soil water content varied from 8.96% to 21.38%. Results suggested a high correlation between soil resistance, as assessed by the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cone index; Indicator kriging; Soil compaction; Spatial distribution.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052010000500017
Registros recuperados: 115
Primeira ... 123456 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional