|
|
|
| Registros recuperados: 61 | |
|
|
| Soares,Bruno Lima; Ferreira,Paulo Ademar Avelar; Rufini,Márcia; Martins,Fábio Aurélio Dias; Oliveira,Dâmiany Pádua; Reis,Ricardo Pereira; Andrade,Messias José Bastos de; Moreira,Fatima Maria de Souza. |
| ABSTRACT Management of biological nitrogen fixation in common bean still requires improvement. The objective of this study was to verify the compatibility of nitrogen fertilization with biological N2 fixation to increase common bean yield and profitability. Four field experiments were performed in four municipalities of Minas Gerais, Brazil, during the 2009 and 2010 winter crop season. The 2009 crop experiments were set up under a no-till system and the 2010 crop was conducted using conventional tillage. A randomized block experimental design was used with four replications and seven treatments combining application rates of mineral N (at sowing and/or topdressing) and seed inoculation with Rhizobium tropici strain CIAT899. Inoculation with 20 kg ha-1... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phaseolus vulgaris; Nitrogen fixation; No-till; Conventional tillage. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100416 |
| |
|
|
| SÁ, M. A. C. de; SANTOS JÚNIOR, J. de D. G. dos; MIRANDA, L. N. de. |
| RESUMO: O objetivo deste trabalho foi determinar o intervalo hídrico ótimo utilizando-se um minipenetrômetro dinâmico em sistema de semeadura direta e preparo convencional do solo, cultivado com feijão em sistema irrigado. Amostras indeformadas foram coletadas em trincheiras de 0,80 m de largura por 0,50 m de profundidade, na porção central das camadas 0,00-0,10, 0,10-0,20, 0,20-0,30, 0,30-0,40 e 0,40-0,50 m. Em cada camada, foram coletadas sete amostras perpendicularmente à linha de plantio em intervalos regulares de 0,10 m, até os 0,30 m das entrelinhas adjacentes. Foram determinados o intervalo hídrico ótimo (IHO), a densidade do solo (Ds), a resistência à penetração (índice de cone - IC), a produtividade de grãos e a massa de raízes. Foram observados... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Plantio convencional; Zero tillage; Soil compactation.; Compactação do Solo; Perfil do Solo; Plantio Direto; Solo.; Conventional tillage; Soil; Soil profiles.. |
| Ano: 2007 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/571543 |
| |
|
|
| CARVALHO, J. L. N.; CERRI, C. E. P.; FEIGL, B. P.; PÍCCOLO, M. C.; GODINHO, V. de P. C.; CERRI, C. C.. |
| The introduction of crop management practices after conversion of Amazon Cerrado into cropland influences soil C stocks and has direct and indirect consequences on greenhouse gases (GHG) emissions. The aim of this study was to quantify soil C sequestration, through the evaluation of the changes in C stocks, as well as the GHG fluxes (N2O and CH4) during the process of conversion of Cerrado into agricultural land in the southwestern Amazon region, comparing no-tillage (NT) and conventional tillage (CT) systems. We collected samples from soils and made gas flux measurements in July 2004 (the dry season) and in January 2005 (the wet season) at six areas: Cerrado, CT cultivated with rice for 1 year (1CT) and 2 years (2CT), and NT cultivated with soybean for 1... |
| Tipo: Artigo de periódico |
Palavras-chave: Amazon; Carbono; Cerrado; Solo; Amazonia; Carbon; Conventional tillage; Greenhouse gases; No-tillage; Soil. |
| Ano: 2009 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/709344 |
| |
|
|
| Campos,Ben-Hur Costa de; Amado,Telmo Jorge Carneiro; Bayer,Cimélio; Nicoloso,Rodrigo da Silveira; Fiorin,Jackson Ernani. |
| Soil organic matter (SOM) plays a crucial role in soil quality and can act as an atmospheric C-CO2 sink under conservationist management systems. This study aimed to evaluate the long-term effects (19 years) of tillage (CT-conventional tillage and NT-no tillage) and crop rotations (R0-monoculture system, R1-winter crop rotation, and R2- intensive crop rotation) on total, particulate and mineral-associated organic carbon (C) stocks of an originally degraded Red Oxisol in Cruz Alta, RS, Southern Brazil. The climate is humid subtropical Cfa 2a (Köppen classification), the mean annual precipitation 1,774 mm and mean annual temperature 19.2 ºC. The plots were divided into four segments, of which each was sampled in the layers 0-0.05, 0.05-0.10, 0.10-0.20, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carbon sequestration; No-tillage; Conventional tillage; Soil management. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000300016 |
| |
|
|
| Ferreira,Eloisa Aparecida Belleza; Bustamante,Mercedes Maria da Cunha; Resck,Dimas Vital Siqueira; Figueiredo,Cícero Célio de; Pinto,Alexandre de Siqueira; Malaquias,Juaci Vitória. |
| ABSTRACT Changes in carbon stocks in different compartments of soil organic matter of a clayey Latossolo Vermelho Distrófico (Typic Haplustox), caused by the substitution of native savanna vegetation (cerrado sensu stricto) by agroecosystems, were assessed after 31 years of cultivation. Under native vegetation, a stock of 164.5 Mg ha-1 C was estimated in the 0.00-1.00 m layer. After 31 years of cultivation, these changes in soil C stocks were detected to a depth of 0.60 m. In the case of substitution of cerrado sensu stricto by no-tillage soybean-corn rotation, a reduction of at least 11 % of the soil C pools was observed. However, the adoption of no-tillage as an alternative to tillage with a moldboard plow (conventional system) reduced CO2 emissions by... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Conventional tillage; No-tillage; Microbial biomass; Particulate organic matter. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100507 |
| |
|
|
| Siqueira Neto, Marcos; USP; Piccolo, Marisa de Cássia; Centro de Energia Nuclear na Agricultura (CENA/USP); Scopel, Eric; EMBRAPA; Costa Junior, Ciniro; Centro de Energia Nuclear na Agricultura (CENA/USP); Cerri, Carlos Clemente; USP; Bernoux, Martial; Institut de Recherche pour le Development. |
| A região do Cerrado representa uma das maiores áreas cultivada do mundo. Os diferentes usos do solo empregados nesta região podem modificar efetivamente as quantidades de matéria orgânica e alterar a ciclagem dos nutrientes no solo. O objetivo deste estudo foi avaliar o efeito de diferentes sistemas de manejo nas relações entre o carbono total e os atributos químicos de um Latossolo Vermelho distrófico no Cerrado na região de Rio Verde, Estado de Goiás. As áreas estudadas foram cerradão, pastagem de baixa produtividade, plantio convencional de soja e plantio direto de soja com milho em sucessão. Os valores mais baixos no pH, cátions trocáveis, P-disponível e enxofre foram observados no Cerradão, contudo foram encontrados os maiores teores de C-total, que... |
|
Palavras-chave: 5.02.01.07-7 Solos Florestais fertilidade do solo; Plantio direto; Plantio convencional; Pastagem; Soja Manejo e Conservação do Solo soil fertility; No-tillage; Conventional tillage; Pasture; Soybean. |
| Ano: 2009 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/792 |
| |
|
| |
|
| |
|
|
| Sautter,Klaus Dieter; Santos,Honório Roberto dos; Ribeiro Júnior,Paulo Justiniano. |
| This work had as objective to compare the communities of Sminthuroidea and Onychiuridae (Collembola) among no-tillage in three fertility levels, conventional tillage and a natural ecosystem (native grassland). In the conventional tillage and in the no-tillage in area of medium fertility, the community of Sminthuroidea had regular fluctuation along the period of the experiment, but wtth low densities. The no-tillage in area of high fertility presented a populational pick in the autumn; the no-tillage in area of low fertility, in the spring; and, the natural ecosystem, in the summer. As the final mean density of the population of Sminthuroidea, was observed that the no-tillage in area of low fertility went numerically superior to the others, proceeded by the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Collembola; Onychiuridae; Sminthuroidea; No-tillage; Conventional tillage. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000100007 |
| |
|
|
| MATTER, U. F.; OLIVEIRA, T. K. de; CONTREIRAS, C. T.. |
| No Acre, o cultivo de milho é realizado através do sistema convencional de preparo do solo, sendo utilizadas áreas anteriormente ocupadas por pastagens de gramíneas. Em função do regime de chuvas da região, o sistema de plantio direto possibilita maior número de dias úteis à operação de plantio, dentre outras vantagens. Porém, nesse sistema, devido à imobilização do nitrogênio pelos restos de capim, é necessária maior quantidade de N para produção satisfatória de milho. Objetivou-se avaliar a exigência de nitrogênio no primeiro ano de plantio de milho em área ocupada por pastagem nos sistemas de preparo convencional e direto. Foi conduzido experimento em Latossolo Vermelho distrófico textura média, no delineamento experimental de blocos casualizados e... |
| Tipo: Parte de livro |
Palavras-chave: Acre; Plantio convencional; Latossolo vermelho distrófico; Maíz; Cero labranza; Labranza convencional; Nitrógeno; Mineralización; Pastizales; Rendimiento de los cultivos; Integrated crop-livestock systems; Integração lavoura-pecuária; Amazônia Ocidental; Western Amazon; Amazonia Occidental.; Milho; Adubação de Cobertura; Plantio Direto; Zea Mays; Rendimento.; Pastagem; Fixação de Nitrogênio; Pastures; Nitrogen fertilizers; Mineralization; Integrated agricultural systems; No-tillage; Corn; Crop yield.; Nitrogen; Conventional tillage. |
| Ano: 2010 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1130108 |
| |
|
|
| PARDO,G.; MARTÍNEZ,Y.. |
| ABSTRACT: Weed control is a crucial aspect in many conservation agriculture systems given that costs and time savings from avoiding tillage are closely linked to the use of effective and environmental friendly herbicides. This has led to the widespread use of glyphosate in farms, as it is a broad-spectrum, easily degradable, low- cost herbicide. The recent debate on the safety of glyphosate and on the excessive use of chemical herbicides in food production has caused concern on farmers about the possible economic effects of a virtual ban on glyphosate. The aim of this paper is to estimate the costs associated with an eventual prohibition of glyphosate in Spanish conservation agriculture areas. The costs of different alternative weed control strategies for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Conservation systems; Conventional tillage; Economic evaluation; Weed control. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100166 |
| |
|
| |
|
| |
|
| |
|
|
| CARVALHO, J. L. N.; CERRI, C. E. P.; FEIGL, B. J.; PICCOLO, M. de C.; GODINHO, V. de P.; HERPIN, U.; CERRI, C. C.. |
| Mudanças de uso da terra e práticas de manejo modificam a dinâmica do C e a fertilidade do solo. Este estudo avaliou as implicações dos sistemas de cultivo (NT e CT) nos estoques de C e de nutrientes e identificou inter-relações entre estes estoques e outros atributos da fertilidade do solo em Latossolo após a mudança do uso da terra no cerrado amazônico. Os estoques de C e de nutrientes (P, K, Ca e Mg) ajustados pela massa equivalente do solo sob cerrado (CE), foram maiores principalmente sob NT. Após a adoção do NT, exceto em 2NT, os estoques de C foram maiores em relação às demais áreas avaliadas. Correlações entre estoques de C e de nutrientes revelaram algumas correlações positivas com Ca e Mg nas áreas sob NT, devido ao uso continuo de calcário, à... |
| Tipo: Separatas |
Palavras-chave: Plantio convencional; Estoque de nutrientes; Nutrient stock.; Latossolo; Oxisol; Plantio Direto.; Conventional tillage; No-tillage.. |
| Ano: 2009 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/709880 |
| |
|
|
| Carvalho,João Luís Nunes; Carlos Eduardo Pelegrino,Cerri; Feigl,Brigitte Josefine; Píccolo,Marisa de Cássia; Godinho,Vicente de Paula; Herpin,Uwe; Cerri,Carlos Clemente. |
| Land use change and land management practices can modify soil carbon (C) dynamics and soil fertility. This study evaluated the effect of tillage systems (no-tillage - NT and conventional tillage - CT) on soil C and nutrient stocks in an Oxisol from an Amazonian cerrado following land use change. The study also identified relationships between these stocks and other soil attributes. Carbon, P, K, Ca and Mg stocks, adjusted to the equivalent soil mass in the cerrado (CE), were higher under NT. After adoption of all but one of the NT treatments, C stocks were higher than they were in the other areas we considered. Correlations between C and nutrient stocks showed positive correlations with Ca and Mg under NT due to continuous liming, higher crop residue... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oxisol; No-tillage; Conventional tillage; Nutrient stock. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000200013 |
| |
|
|
| Narimatsu,Karem C. P.; Mello,Luiz M. M. de; Domingues,Luis A. da Silva; Chioderoli,Carlos A.; Lima,Ronaldo C.. |
| The evaluation of technologies employed at the agricultural production system such as crop rotation and soil preparation, both associated with crop-livestock integration, is crucial. Therefore, the aim of the present study was to evaluate the incorporation of lime for three no-tillage systems and cultural managements in system of crop-livestock integration, with emphasis on corn grain yield. The experiment was conducted from January 2003 to April 2005 at Selvíria city, MS, in Dystroferric Red Latosol, clay texture. The experimental design was randomized blocks with split plots consisted of three main treatments, aimed the soil physics conditioning and the incorporation of lime: PD - No-no-tillage; CM - minimum no-tillage, and PC - conventional no-tillage;... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: No tillage system; Minimum tillage; Conventional tillage; Crop-livestock integration; Crop rotation. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000200007 |
| |
|
| |
|
| |
| Registros recuperados: 61 | |
|
|
|
