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Agronomic and Economic Efficiency of Common-Bean Inoculation with Rhizobia and Mineral Nitrogen Fertilization Rev. Bras. Ciênc. Solo
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
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ALTERNATIVE COTTON PRODUCTION SYSTEMS AgEcon
Parvin, David W., Jr.; Cooke, Fred T., Jr.; Martin, Steven W..
Mississippi cotton farmers are adjusting to the current problem of low cotton price and high cotton production cost by modifying the way(s) they have traditionally grown cotton. This paper compares seven alternative production systems to the costs and returns associated with the conventional or traditional system labeled "solid cotton, 8-row equipment." Systems that combine wider equipment (less labor and machinery time per acre) with reduced tillage technology appear to offer opportunities to increase returns. Specific adjustments on individual farms will probably be dominated by the distribution of soil types.
Tipo: Working or Discussion Paper Palavras-chave: Conservation tillage; Ultra-narrow; No-till; Skip-row; Costs; Returns; Production Economics.
Ano: 2000 URL: http://purl.umn.edu/15796
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An Economic Evaluation of Conservation Farming Practices for the Central West of NSW AgEcon
Farrell, Terence C..
Economic benefits that arise from conservation farming practices need to be assessed over several years to account for improvements in soil structure and nutrient levels. A gross margin model was used to assess benefits over the eight-year period 1999-2006 for 12 regions in the central west of NSW. The annual benefits from improved soil structure ranged from $2.46 to $12.82 per hectare (ha). A reduction in tractor power produced annual savings in the range of $0.60 to $4.05 per ha. The cost of soil compaction by livestock grazing on crop areas ranged from $3.41 to $14.90 per ha. The break-even time to pay back costs for the conversion of machinery for no-till seeding was two to three seasons.
Tipo: Conference Paper or Presentation Palavras-chave: No-till; Conservation; Farming; Tillage; Cropping systems; Environmental Economics and Policy; Farm Management.
Ano: 2008 URL: http://purl.umn.edu/6177
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An Economic Risk Analysis of Stocker Grazing on Conservation Tillage Small Grains Forage in Arkansas AgEcon
Watkins, K. Bradley; Hignight, Jeffrey A.; Beck, Paul A.; Anders, Merle M.; Hubbell, Donald S., III; Gadberry, Shane.
This study evaluates both the profitability and risk efficiency of grazing stocker steers on conservation tillage winter wheat pasture using simulation and stochastic efficiency with respect to a function (SERF). Average daily gains are simulated for steers grazed on conventional tillage (CT), reduced tillage (RT) and no-till (NT) winter wheat pasture. Steer price distributions and prices for key production inputs such as diesel, fertilizer, and glyphosate are also simulated. Stocker steer net return distributions by tillage treatment are constructed and ranked for risk efficiency using SERF. The results indicate the NT system is the most profitable and most risk efficient of the three tillage systems, followed by the RT system. Both conservation tillage...
Tipo: Conference Paper or Presentation Palavras-chave: No-till; Profitability; Reduced tillage; Risk; SERF; Stocker grazing; Winter wheat; Farm Management; Production Economics.
Ano: 2010 URL: http://purl.umn.edu/56356
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An Economic Risk Analysis of Tillage and Cropping Systems on the Arkansas Grand Prairie AgEcon
Hignight, Jeffrey A.; Watkins, K. Bradley; Anders, Merle M..
No-till (NT) has been shown to reduce fuel, labor, and machinery costs compared to conventional-till (CT) but very few rice producers in Arkansas practice NT. The low adoption rate is most likely due to difficulties in management but also limited information on the profitability and risk of NT. Most rice producers are knowledgeable on NT costs savings but consider it less profitable due to yield reductions offsetting costs savings. This study evaluates production costs, crop yields, and economic risk of both NT and CT in five rice-based cropping systems (continuous rice, rice-soybean, rice-corn, rice-wheat, and rice-wheat-soybean-wheat). Yields, crop prices, and key input prices are simulated to create net return distributions. Stochastic efficiency...
Tipo: Conference Paper or Presentation Palavras-chave: Cropping systems; Rice; No-till; Certainty equivalent; Risk premium; Crop Production/Industries; Farm Management; Financial Economics; Land Economics/Use; Production Economics; Risk and Uncertainty.
Ano: 2010 URL: http://purl.umn.edu/56354
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An Operational Approach for Evaluating Investment Risk: An Application to the No-Till Transition AgEcon
Upadhyay, Bharat Mani; Young, Douglas L..
Roy's safety-first rule is used to provide measures popular with farmers of short and long term business risk associated with various no-till transition strategies over an investment horizon. The short run rule provided more sensitivity to inter-year financial risk than other commonly used criteria. Results revealed that speed of adoption influenced the probability of successful transition more than did the sequence of drill acquisition methods. Higher equity and larger farms had a greater chance of transition success. Slow acreage expansion with a custom or rental drill reduces risk until a no-till yield penalty is eliminated.
Tipo: Working or Discussion Paper Palavras-chave: Investment risk; Monte Carlo simulation; No-till; Rent-purchase; Risk; Safety-first; Technology adoption; Transition strategy; Farm Management; Risk and Uncertainty.
Ano: 2005 URL: http://purl.umn.edu/12958
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Assessing the Impacts of Soil Carbon Credits and Risk on No-Till Rice Profitability AgEcon
Watkins, K. Bradley; Hignight, Jeffrey A.; Anders, Merle M..
Rice is a major cash crop in eastern Arkansas, but most rice acres are intensively cultivated and grown on rented land. No-till is an effective means of sequestering soil carbon and reducing greenhouse gas emissions, and economic incentives exist for no-till in the form of carbon credits. Studies evaluating the economic potential of carbon credits focus on producers only and do not take into consideration the landlord’s perspective. This analysis evaluates the profitability and risk efficiency of no-till management and carbon credits in Arkansas rice production from the prospective if the landlord using simulation and stochastic efficiency with respect to a function (SERF). The results indicate carbon credits may have potential to enhance preference for...
Tipo: Conference Paper or Presentation Palavras-chave: Certainty equivalent; Landlord; No-till; Rice; Risk premium; Farm Management; Production Economics; Risk and Uncertainty.
Ano: 2008 URL: http://purl.umn.edu/45806
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Atividade do alumínio na solução do solo de um latossolo vermelho distrófico submetido ao manejo do solo e de culturas Repositório Alice
SPERA, S. T.; ESCOSTEGUY, P. A. V.; SANTOS, H. P. dos; KLEIN, V. A..
O objetivo do trabalho foi avaliar a interação do manejo do solo e de culturas nos atributos químicos da solução de solo referentes à porcentagem e atividade de formas de Al tóxico de camadas de solo entre 0 a 20 cm. As amostras foram provenientes de experimento conduzido em Passo Fundo, RS, em um Latossolo Vermelho distrófico, com mais de duas décadas de cultivo sem aplicação de calcário. O delineamento experimental utilizado foi de blocos ao acaso, em esquema de subparcelas. Os tratamentos foram: plantio direto (PD), cultivo mínimo com escarificador (PM) e preparo convencional com arado e grade (PC), combinados com as rotações de culturas: trigo/soja (R1); trigo/soja - ervilhaca/sorgo (R2) e trigo/soja - ervilhaca/sorgo - aveia branca/soja (R3), para...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Acidez; Plantio direto; Química do solo; Soil pH; No-till; Plowing; Soil chemistry.
Ano: 2014 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1005884
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Carbon dioxide efflux in a rhodic hapludox as affected by tillage systems in southern Brazil Rev. Bras. Ciênc. Solo
Chavez,Luis Fernando; Amado,Telmo Jorge Carneiro; Bayer,Cimélio; La Scala,Newton Junior; Escobar,Luisa Fernanda; Fiorin,Jackson Ernani; Campos,Ben-Hur Costa de.
Agricultural soils can act as a source or sink of atmospheric C, according to the soil management. This long-term experiment (22 years) was evaluated during 30 days in autumn, to quantify the effect of tillage systems (conventional tillage-CT and no-till-NT) on the soil CO2-C flux in a Rhodic Hapludox in Rio Grande do Sul State, Southern Brazil. A closed-dynamic system (Flux Chamber 6400-09, Licor) and a static system (alkali absorption) were used to measure soil CO2-C flux immediately after soybean harvest. Soil temperature and soil moisture were measured simultaneously with CO2-C flux, by Licor-6400 soil temperature probe and manual TDR, respectively. During the entire month, a CO2-C emission of less than 30 % of the C input through soybean crop residues...
Tipo: Info:eu-repo/semantics/article Palavras-chave: No-till; Greenhouse gases; Soil temperature; Soil moisture.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832009000200010
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Carbon indices to assess quality of management systems in a Subtropical Acrisol. Repositório Alice
ZANATTA, J. A.; VIEIRA, F. C. B.; BRIEDIS, C.; DIECKOW, J.; BAYER, C..
Management systems to improve soil quality are essential for agricultural and environmental sustainability. We assessed the quality of soil management systems applied to a subtropical Acrisol in terms of the carbon management index (CMI), the stratification ratio for total organic carbon (SR-TOC) and light fraction of organic matter (SR-LF). In addition, we examined their relationship to chemical, physical and biological soil quality indicators, as well as to maize yield. The study was conducted on a long-term experiment (18 years) in southern Brazil involving two different systems [no tillage (NT) and conventional tillage (CT)], two cropping systems [black oat/maize (O/M) and black oat + vetch/maize + cowpea (OV/MC)] and two nitrogen fertilizer rates for...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Conservation agriculture; No-till; Quality indicator; Agricultura conservativa; Carbono; Cropping systems; Carbon.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1114374
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Carbon indices to assess quality of management systems in a Subtropical Acrisol Scientia Agricola
Zanatta,Josiléia Acordi; Vieira,Frederico Costa Beber; Briedis,Clever; Dieckow,Jeferson; Bayer,Cimélio.
ABSTRACT: Management systems to improve soil quality are essential for agricultural and environmental sustainability. We assessed the quality of soil management systems applied to a subtropical Acrisol in terms of the carbon management index (CMI), the stratification ratio for total organic carbon (SR-TOC) and light fraction of organic matter (SR-LF). In addition, we examined their relationship to chemical, physical and biological soil quality indicators, as well as to maize yield. The study was conducted on a long-term experiment (18 years) in southern Brazil involving two different systems [no tillage (NT) and conventional tillage (CT)], two cropping systems [black oat/maize (O/M) and black oat + vetch/maize + cowpea (OV/MC)] and two nitrogen fertilizer...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Conservation agriculture; Cropping systems; No-till; Quality indicators.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019001600501
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Carbon Sequestration in Agricultural Soils AgEcon
Wilman, Elizabeth A..
Although it is common to alternate between till and no-till practices, past research has considered farmers’ tillage options to be limited to the dichotomous choice of whether or not to switch to a long-term no-till regime. This paper expands farmers’ options and models their choices of tillage frequency. Less frequent tilling sequesters more carbon but permits a greater accumulation of weeds, whereas more frequent tilling eliminates weeds but releases carbon (tillage emissions). The timing of tillage balances its marginal benefits and costs. Higher payments from industry or government for atmospheric greenhouse gas reductions will increase marginal cost and reduce tillage frequency. Other key parameters, such as higher rates of tillage emissions or...
Tipo: Journal Article Palavras-chave: Land Economics/Use; Resource /Energy Economics and Policy; Carbon contract; No-till; Offsets; Soil carbon sequestration; Tillage frequency.
Ano: 2011 URL: http://purl.umn.edu/105535
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Ciclagem de nutrientes por plantas de cobertura na entressafra em um solo de cerrado Repositório Alice
BOER, C.A.; ASSIS, R.L. de; SILVA, G.P.; BRAZ, A.J.B.P.; BARROSO, A.L. de L.; FILHO, A.C.; PIRES, F.R..
O objetivo deste trabalho foi avaliar o acúmulo e a liberação de nutrientes (N, P, K, Ca, Mg e S) de resíduos culturais de plantas de cobertura na entressafra, em condições de Cerrado. O experimento foi conduzido em um Latossolo Vermelho distroférrico com textura argilosa. As plantas de cobertura avaliadas foram: amaranto (Amaranthus cruentus L.), milheto (Pennisetum glaucum L.) e capim-pé-de-galinha (Eleusine coracana (L.) Gaertn.). O delineamento experimental utilizado foi o de blocos ao acaso, no esquema de parcelas subdivididas, com quatro repetições. Na fase de florescimento das espécies, foi avaliada a produção de matéria seca e o acúmulo de nutrientes. A fim de avaliar a liberação de nutrientes dos resíduos culturais, o material vegetal de cada...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Amaranthus cruentus; Pennisetum glaucum; Eleusine coracana; Dinâmica de decomposição; Liberação de nutrientes; Plantio direto; Decomposition dynamics; Nutrient release; No-till.
Ano: 2007 URL: http://www.alice.cnptia.embrapa.br/handle/doc/122806
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Climate Change Legislation: Positive or Negative For North Dakota Agriculture? AgEcon
Taylor, Richard D.; Koo, Won W..
The United States House of Representatives passed a climate change bill entitled “The American Clean Energy and Security Act” in June 2009. The bill establishes a combined efficiency and renewable electricity standard which requires retail electricity suppliers to utilize 20% renewable energy by 2020. The objective of this study is to estimate the costs of the American Clean Energy and Security Act in crop production and the benefits of carbon sequestration under the legislation. This study especially evaluates the impact of the legislation on the North Dakota farm income under a Cap and Trade system with and without carbon sequestration. Three different carbon sequestration programs are evaluated to estimate the impact of each program on the net farm...
Tipo: Report Palavras-chave: Carbon sequestration; American Clean Energy and Security Act; North Dakota Representative Farm model; No-till; Wetlands; Woodlands; Net farm income; Agribusiness.
Ano: 2009 URL: http://purl.umn.edu/55940
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Congo grass grown in rotation with soybean affects phosphorus bound to soil carbon Rev. Bras. Ciênc. Solo
Merlin,Alexandre; He,Zhenli L.; Rosolem,Ciro Antonio.
The phosphorus supply to crops in tropical soils is deficient due to its somewhat insoluble nature in soil, and addition of P fertilizers has been necessary to achieve high yields. The objective of this study was to examine the mechanisms through which a cover crop (Congo grass - Brachiaria ruziziensis) in rotation with soybean can enhance soil and fertilizer P availability using long-term field trials and laboratory chemical fractionation approaches. The experimental field had been cropped to soybean in rotation with several species under no-till for six years. An application rate of no P or 240 kg ha-1 of P2O5 had been applied as triple superphosphate or as Arad rock phosphate. In April 2009, once more 0.0 or 80.0 kg ha-1 of P2O5 was applied to the same...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Crop rotation; No-till; Organic P; Phosphorus fractionation.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000300020
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Conventional Tillage versus No-till: Characteristics of Producers and Farms AgEcon
Djido, Abdoulaye Ibrahim; Vitale, Jeffrey D.; Epplin, Francis M..
A survey of Oklahoma farmers was conducted to determine characteristics of farms across three tillage categories: conventional tillage exclusively; no-till exclusively; other (combination of systems). The seven percent that use no-till exclusively crop more acres, rent more acres, and use more crop rotations than farms that use conventional tillage exclusively.
Tipo: Conference Paper or Presentation Palavras-chave: No-till; Conventional tillage; Survey; Farm machinery; Farm size; Wheat; Perceptions; Crop Production/Industries; Farm Management; Q10; Q12.
Ano: 2009 URL: http://purl.umn.edu/46717
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COSTS, YIELDS, AND NET RETURNS, COMMERCIAL NO-TILL COTTON PRODUCTION, MISSISSIPPI, 1999 AgEcon
Parvin, David W., Jr.; Cooke, Fred T., Jr..
An analysis of a 1999 sample of ten no-till producers indicates that over a reasonable range of cotton lint prices, no-till cotton production may result in larger net returns per acre than conventional tillage. However, the authors caution that additional analysis based on a larger sample of commercial no-till growers on better cotton soils is needed.
Tipo: Working or Discussion Paper Palavras-chave: No-till; Spindle harvest; Cost of production; Yield; Production Economics.
Ano: 2000 URL: http://purl.umn.edu/15794
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Desempenho de plantas de cobertura em sobressemeadura na cultura da soja. Repositório Alice
PACHECO, L.P.; PIRES, F.R.; MONTEIRO, F.P.; PROCÓPIO, S. de O.; ASSIS, R.L. de; CARMO, M.L. do; PETTER, F.A..
O objetivo deste trabalho foi avaliar a capacidade de estabelecimento de plantas de cobertura em sobressemeadura na cultura soja. A soja foi semeada em diferentes épocas para que, no estádio R7 (maturação fisiológica), ocorressem diferentes condições climáticas para implantação das plantas de cobertura. O experimento foi realizado em Rio Verde, GO, na safra de verão 2005/2006, em Latossolo Vermelho distroférrico. Foram avaliadas seis plantas de cobertura: Brachiaria brizantha, B. ruziziensis, B. decumbens, Eleusine coracana, Pennisetum glaucum e o híbrido Cober Crop [Sorghum bicolor (L.) Moench x Sorghum sudanense Piper Stapf], e uma testemunha mantida em pousio. A soja foi semeada em quatro épocas: 27/10/2005, 10/11/2005, 24/11/2005 e 14/12/2005. A...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Brachiaria; Eleusine coracana; Pennisetum glaucum; Integração lavoura-pecuária; Plantio direto; Cober Crop; Crop-livestock integration; No-till.
Ano: 2008 URL: http://www.alice.cnptia.embrapa.br/handle/doc/122098
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Desempenho de semeadora-adubadora utilizando-se dois mecanismos rompedores e três pressões da roda compactadora Repositório Alice
KOAKOSKI, A.; SOUZA, C.M.A. de; RAFULL, L.Z.L.; SOUZA, L.C.F. de; REIS, E.F. dos.
O objetivo deste trabalho foi estudar o efeito de diferentes mecanismos rompedores e níveis de pressões aplicadas pela roda compactadora sobre o desempenho de uma semeadora-adubadora na implantação da cultura de soja, em plantio direto sob três teores de água no solo. O experimento foi montado em esquema de parcelas subsubdivididas, em que as parcelas foram constituídas pelos três teores avaliados de água no solo (0,22, 0,24 e 0,26 kg kg-1), as subparcelas por dois mecanismos rompedores (facão e disco duplo) e as subsubparcelas por três níveis de pressões aplicadas pela roda compactadora (12,2, 18,5 e 24,1 kPa), com três repetições, em um delineamento de blocos ao acaso. Foram analisadas a distância entre sementes, a profundidade de deposição, a...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Soja; Plantio direto; Umidade de semeadura; Soybean; No-till; Sowing moisture.
Ano: 2007 URL: http://www.alice.cnptia.embrapa.br/handle/doc/126201
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Dessecação pré-colheita de soja e Brachiaria brizantha consorciadas com doses reduzidas de graminicida. Repositório Alice
SILVA, A.C. da; FREITAS, F.C.; FERREIRA, L.R.; FREITAS, R.S..
O objetivo deste trabalho foi avaliar os efeitos da dessecação pré-colheita de soja consorciada com Brachiaria brizantha cv. Marandu, com doses reduzidas de graminicida, na viabilização de colheita mecânica de soja e na capacidade de rebrota e formação de palha de B. brizantha. Foi utilizado esquema fatorial 5x3, com cinco doses do graminicida fluazifop-p-butil ? 0, 15, 30, 45 e 60 g ha-1 ? e três manejos de dessecação do consórcio ? sem dessecação e com dessecação nos estádios R7 ou R8 da soja ?, em delineamento de blocos casualizados, com quatro repetições. Foram avaliadas duas testemunhas, soja e B. brizantha em monocultivo, capinadas manualmente. A braquiária foi altamente suscetível à ação do graminicida. O consórcio entre soja e B. brizantha,...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Glycine max; Braquiária; Plantio direto; Cobertura morta; Manejo; No-till; Mulching; Management.
Ano: 2006 URL: http://www.alice.cnptia.embrapa.br/handle/doc/118419
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