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| Registros recuperados: 174 | |
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| Guimarães,Claudinei Martins; Costa,Carlos Alexandre Gomes; Carneiro,Leandro Flávio; Assunção,Hildeu Ferreira da. |
| ABSTRACT The technique of Time Domain Reflectometry (TDR) is important in the evaluation of soil moisture due to being an instantaneous method, which is non-destructive, precise and little dependent on environmental factors. However, researchers have emphasised the need for continuous specific calibration for each soil-management situation. The aim of this work therefore, was to evaluate the response of a portable TDR sensor to soil moisture in a Dystroferric Red Latosol in the Cerrado, under three different systems of soil management and at three different depths in the soil profile. To do this, TDR equipment consisting of two rods, each 0.12 m in length, was used for instantaneous measurement of the volumetric water content of the soil. The depths of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil water content; Soil management; Dielectric permittivity; Cropping systems; Time domain reflectrometry.. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000100001 |
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| HOFFMANN-CAMPO, C.B.; SARAIVA, O. F.. |
| Manejo do solo e de espécies vegetais em sistemas de produção com a soja; Avaliação de doenças de soja e suas relações com as propriedades microbiológicas, físicas e químicas do solo, em diferentes sequências de culturas (04.2000.328-01); Avaliação de sistemas de preparo do solo e manejo do plantio direto envolvendo sucessão e rotação de culturas (04.2000.328-02); Sistema misto de rotação de lavoura e pasto em semeadura direta no Planalto Meridional do Paraná (04.2000.328-03); Rotação de culturas anuais no Planalto Meridional Paranaense (04.2000.328-04); Manejo dos resíduos da colheita condicionado por sistemas de preparo do solo (04.2000.328-05); Biologia e controle de plantas daninhas na cultura da soja; Impacto do uso de herbicidas sobre a comunidade... |
| Tipo: Documentos (INFOTECA-E) |
Palavras-chave: Manejo de solo.; Erva Daninha; Soja.; Soil management; Soybeans; Weeds.. |
| Ano: 2001 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/462861 |
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| HOFFMANN-CAMPO, C. B.; SARAIVA, O. F.. |
| Manejo do solo e de espécies vegetais em sistemas de produção com a soja; Avaliação de doenças de soja e suas relações com as propriedades microbiológicas, físicas e químicas do solo, em diferentes seqüência de culturas (04.2000.328-01); Avaliação de sistemas de preparo do solo e manejo do plantio direto envolvendo sucessão e rotação de culturas (04.2000.328-02); Manejo dos resíduos da colheita condicionado por sistemas de preparo do solo (04.2000.328-05); Biologia e controle de plantas daninhas na cultura da soja; Impacto do uso de herbicidas sobre a comunidade infestante e a cultura da soja (04.2000.324-01): Biologia e manejo integrado de plantas daninhas na cultura da soja (04.2000.324-02); Dinâmica do estabelecimento de espécies de plantas daninhas... |
| Tipo: Documentos (INFOTECA-E) |
Palavras-chave: Manejo de solo.; Erva Daninha; Soja.; Soil management; Soybeans; Weeds.. |
| Ano: 2002 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/463847 |
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| Storck,Lindolfo; Kobata,Sarha G. K.; Brum,Betania; Soares,André B.; Modolo,Alcir J.; Assmann,Tangriani S.. |
| ABSTRACT This study aimed to estimate the size of blocks of observations of resistance to penetration, obtained by a motorized digital penetrometer, and the number of blocks with semi-amplitude of the confidence interval between 5 and 20% of the mean penetration resistance, for different soil depth ranges and cone diameters. Data were collected in two contrasting plots of a crop-livestock integration experiment, located in Abelardo Luz, SC, Brazil. Ten blocks were delimited and the resistance to penetration was determined in 20 points spaced by 20 cm, using a motorized digital soil penetrometer. To estimate the mean of resistance to penetration, 12 blocks of four points per experimental plot should be used for a semi-amplitude of the confidence interval... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sample size; Penetration resistance; Grazing pressure; Soil management. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000300250 |
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| Stefanoski,Diane Cristina; Figueiredo,Cícero Célio de; Santos,Glenio Guimarães; Marchão,Robélio Leandro. |
| Abstract The objective of this work was to assess soil quality indicators obtained with different datasets to compare soil management systems in the Brazilian Cerrado. Three criteria were used to select soil physical, chemical, and biological indicators: the full set of indicators obtained, with 36 parameters, for which all the physical, chemical, and biological soil properties were determined; a subset of indicators selected by principal component analysis (20 parameters); and a subset of indicators with some frequency of use in the literature (16 parameters). These indicators were obtained from the following management systems: no-tillage, conventional tillage, and native cerrado vegetation. Soil samples were collected at 0.0-0.1-m soil depth, and soil... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: No-tillage; Principal component analysis; Soil functioning; Soil health; Soil management; Soil security. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2016000901643 |
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| Matous, Petr; University of Tokyo; University of Sydney; petr.matous@sydney.edu.au. |
| Many agrarian communities in developing countries suffer from insufficient productivity and use farming practices that deteriorate the environment both locally and globally. Research suggests that social networks play a role in environmental management, different studies emphasize different aspects of network structures, and the implications of the scales at which networks operate are not explicitly discussed. Here, I ask what types of social structures in farmer networks are conducive to environmental protection and agricultural productivity enhancement, and I show that the answer depends on the scale of the investigation. Using original data representing 16 farmer groups comprising 315 households and 1575 information-sharing links, I analyzed the... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Community-based management; Cross-level interactions; Fertilizers; Social networks; Soil management. |
| Ano: 2015 |
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| Nascente,Adriano Stephan; Li,Yuncong; Crusciol,Carlos Alexandre Costa. |
| Soil aggregation and the distribution of total organic carbon (TOC) may be affected by soil tillage and cover crops. The objective of this study was to determine the effects of crop rotation with cover crops on soil aggregation, TOC concentration in the soil aggregate fractions, and soil bulk density under a no-tillage system (NTS) and conventional tillage system (CTS, one plowing and two disking). This was a three-year study with cover crop/rice/cover crop/rice rotations in the Brazilian Cerrado. A randomized block experimental design with six treatments and three replications was used. The cover crops (treatments) were: fallow, Panicum maximum, Brachiaria ruziziensis, Brachiaria brizantha, and millet (Pennisetum glaucum). An additional treatment, fallow... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brachiaria brizantha; Brachiaria ruziziensis; No-tillage system; Panicum maximum; Pennisetum glaucum; Soil management. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000300871 |
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| Beutler,Amauri Nelson; Centurion,José Frederico; Silva,Alvaro Pires da; Centurion,Maria Aparecida Pessôa da Cruz; Leonel,Cristian Luarte; Freddi,Onã da Silva. |
| The research aimed to evaluate machine traffic effect on soil compaction and the least limiting water range related to soybean cultivar yields, during two years, in a Haplustox soil. The six treatments were related to tractor (11 Mg weight) passes by the same place: T0, no compaction; and T1*, 1; T1, 1; T2, 2; T4, 4 and T6, 6. In the treatment T1*, the compaction occurred when soil was dried, in 2003/2004, and with a 4 Mg tractor in 2004/2005. Soybean yield was evaluated in relation to soil compaction during two agricultural years in completely randomized design (compaction levels); however, in the second year, there was a factorial scheme (compaction levels, with and without irrigation), with four replicates represented by 9 m² plots. In the first year,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glicine max; Soil management; Soil physical quality. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2008001100019 |
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| Marasca,Indiamara; Lemos,Stella Vannucci; Silva,Reginaldo Barbosa; Guerra,Saulo Philipe Sebastião; Lanças,Kleber Pereira. |
| ABSTRACT Soil tillage that maintains the productivity of sugarcane plantations, providing an area for the root development and without traffic on crop rows, has given rise to new technologies in rural areas. The purpose of this study was to evaluate the soil physical properties in two sugarcane plantations, one of which was prepared with deep tilling and the other with conventional tillage. The experiment was conducted in Lençóis Paulista, São Paulo State. Soil penetration resistance and relative density were analyzed. The cone index was lower in deep-tilled soil without traffic in all layers, than in deep-tilled soil with traffic and in conventional tillage. In both tillage treatments, the relative density values were acceptable in the 0.00-0.15 m soil... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil management; Soil tillage; Subsoiler; Traffic control system; Saccharum spp. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000501490 |
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| Cunha Neto,Felipe Vieira da; Correia,Maria Elizabeth Fernandes; Pereira,Guilherme Henrique Almeida; Pereira,Marcos Gervasio; Leles,Paulo Sérgio dos Santos. |
| The interactions between soil invertebrates and environmental variations are relatively unknown in the assessment of soil quality. The objective of this study was to evaluate soil quality in areas with different soil management systems, based on soil fauna as indicator, in Além Paraíba, Minas Gerais, Brazil. The soil invertebrate community was sampled using pitfall traps, in the dry and rainy seasons, from areas with five vegetation types (acacia, mimosa, eucalyptus, pasture, and secondary forest). The abundance of organisms and the total and average richness, Shannon's diversity index, the Pielou uniformity index, and change index V were determined. The fauna was most abundant in the areas of secondary forest and mimosa plantations in the dry season... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Edaphic community; Soil management; Biological indicators. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000500004 |
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| Balota,Elcio L.; Machineski,Oswaldo; Matos,Maria A.. |
| ABSTRACT The objective of this work was to evaluate the changes in microbial biomass C, N and P due to the application of pig slurry under different soil tillage systems. The experiment was established in a clayey Oxisol, Eutrophic Red Latossol in Palotina, PR. Different quantities of pig slurry (0, 30, 60 and 120 m3 ha-1 year-1) were applied to the soil prior to the summer and winter crop season under conventional tillage (CT) and no tillage (NT), in three replicates. The area was cultivated with soybean (Glycine max L.) or maize (Zea mays L.) in the summer and wheat (Triticum sativum Lam.) or oat (Avena sativa L.) in the winter. The soil samples were collected in March and October of 1998 and 1999 at depths of 0-5, 5-10 and 10-20 cm. The soil tillage and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Microbial activity; Swine manure; Soil management; Nutrient cycling. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662012000500004 |
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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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| Christensen, Lee A.. |
| Corn production uses over 25 percent of the Nation's cropland and more than 40 percent of the commercial fertilizer applied to crops. Thus, corn farmers' choices of soil, nutrient, and water management systems can have a major impact not only on their own profitability, but also on the environment. If sound economic and environmental choices are to be encouraged, it may help to assess relationships between operator and farm characteristics and the adoption of management techniques by corn farmers. Data from the 1996 Agricultural Resource Management Survey (ARMS) of U.S. corn farms and producers are analyzed for this purpose, supplemented by a literature survey on factors that influence corn farm management choices. Relationships were found between certain... |
| Tipo: Report |
Palavras-chave: ARMS; Soil management; Nutrient management; Irrigation systems; Profitability; Socioeconomic variables; Crop Production/Industries. |
| Ano: 2002 |
URL: http://purl.umn.edu/33618 |
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| Assunção,Shirlei Almeida; Oliveira,Ana Paula Pessim; Anjos,Lúcia Helena Cunha dos; Pereira,Marcos Gervasio; Lima,Eduardo. |
| ABSTRACT The recent approach of eliminating the use of fire for sugarcane harvesting (green cane) resulted in managing the crop on a trash-blanketed soil, which changed the content and dynamic of carbon and the nitrogen requirement. These alterations are relevant due to economic and environmental aspects of sugarcane production systems. This study aimed to evaluate changes in total organic carbon (TOC), total nitrogen (TN) and soil organic matter fractions with the application of N-fertilizer on the residues of green cane. The experiment was with sugarcane at the fourth ratoon in Linhares, Espírito Santo State, Brazil. The soil is a Xanthic Dystrudults, originated from Barreiras Group sediments in the coastal tableland region. The treatments were set in a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil management; Saccharum officinarum; Sugarcane residues. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052018000200356 |
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| Registros recuperados: 174 | |
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