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	Provedor de dados AgEcon (17) Rev. Bras. Ciênc. Solo (6) Scientia Agricola (4) CIGR Journal (2) Planta Daninha (2) Agronomy (1) BABT (1) AGRIAMBI (1) Mais... Autor Anders, Merle M. (5) Watkins, K. Bradley (5) Hignight, Jeffrey A. (4) Bayer,Cimélio (2) Cooke, Fred T., Jr. (2) Parvin, David W., Jr. (2) Akbarnia, A. (1) Almeida,D.P. (1) Almeida,Edinei de (1) Alves,Valdecir Batista (1) Amado,Telmo Jorge Carneiro (1) Andrade, Messias José Bastos de; Universidade Federal de Lavras (1) Andrade,Messias José Bastos de (1) Anjos,Adilson dos (1) Arf,Orivaldo (1) Barbosa,Fabrício Tondello (1) Beck, Paul A. (1) Bertol,Ildegardis (1) Briedis,Clever (1) Burton, Michael P. (1) Mais... Palavra-chave No-till (34) Farm Management (11) Production Economics (6) Land Economics/Use (5) Risk and Uncertainty (5) Conservation tillage (4) Rice (4) Carbon sequestration (3) Cropping systems (3) Environmental Economics and Policy (3) Q12 (3) Risk (3) Technology adoption (3) Certainty equivalent (2) Conservation agriculture (2) Conventional tillage (2) Crop Production/Industries (2) Crop rotation (2) Mixed integer programming (2) Perceptions (2) Mais... Tipo do documento Info:eu-repo/semantics/article (16) Conference Paper or Presentation (8) Report (3) Working or Discussion Paper (3) Journal Article (2) Article (1) Mais... Ano 2019 (1) 2018 (1) 2017 (1) 2016 (2) 2014 (3) 2013 (2) 2012 (1) 2011 (2) 2010 (8) 2009 (3) 2008 (3) 2006 (2) 2005 (1) 2004 (1) 2003 (1) 2000 (2) Mais... País United States (17) Brazil (15) China (2) Idioma Inglês (33) Português (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 34 Primeira ... 1 2 ... Última Grass straw mulching to suppress emergence and early growth of weeds Planta Daninha Oliveira Jr,R.S.; Rios,F.A.; Constantin,J.; Ishii-Iwamoto,E.L.; Gemelli,A.; Martini,P.E.. Sorghum, pearl millet, and Brachiaria ruziziensis have similar characteristics which have led to their use for mulch formation in no-till systems. This study was carried out to evaluate the potential of these three species as straw suppliers to suppress weed emergence. Initial findings led to the conclusion that both pearl millet and Brachiaria ruziziensis have similar or superior potential as weed suppressors, compared to sorghum straw, a species with recognized allelopathic potential. Subsequently, new trials were conducted under greenhouse conditions by sowing weed species in pots, followed by covering of the soil with the straw under evaluation. Independent experiments were conducted for Euphorbia heterophylla and Bidens pilosa. In each experiment, the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Allelopathy; No-till; Beggarticks; Poinsettia. Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000100002 Weed suppression in the formation of brachiarias under three sowing methods Planta Daninha Lima,S.F.; Timossi,P.C.; Almeida,D.P.; Silva,U.R.. The success of conservation systems such as no-till depends on adequate soil cover throughout the year, which is possible through the use of cover crops. For this purpose the species belonging to the genus Urochloa has stood out by virtue of its hardiness and tolerance to drought. Aiming ground cover for the no-till system, the objective was to evaluate the establishment of two species of the genus Urochloa, in three sowing methods, in the weed suppression and the sensitivity of these forages to glyphosate. The study design was a randomized block with a 2 x 3 x 3 factorial arrangement, in which factor A was composed of Urochloa ruziziensis and Urochloa hybrid CIAT 36087 cv. Mulato II, factor B was formed by sowing methods: sown without embedding, sown with... Tipo: Info:eu-repo/semantics/article Palavras-chave: No-till; Crop-livestock integration; Urochloa sp; Desiccation; Glyphosate. Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000400004 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 The Impacts of Farm Size and Economic Risk on No-Till Rice Whole-Farm Profitability AgEcon Watkins, K. Bradley; Hignight, Jeffrey A.; Anders, Merle M.. This study evaluated the impacts of farm size and stochastic return variability on no-till (NT) rice profitability at the whole-farm level. Mixed integer programming was used to determine optimal machinery complements, fuel consumption, and machinery labor requirements for conventional till (CT) and NT rice-soybean farms of 1200, 2400, and 3600 acres in size. Crop yields, market prices, and prices for key production inputs were simulated to construct stochastic whole-farm net returns for each farm size under CT and NT management, and both first and second degree stochastic dominance analysis were used to rank cumulative distribution functions of whole-farm returns according to specified risk preferences. The results indicate NT farms exhibit second degree... Tipo: Conference Paper or Presentation Palavras-chave: Mixed integer programming; No-till; Profitability; Rice; Risk; Simulation; Stochastic dominance; Whole-farm; Farm Management; Production Economics; Risk and Uncertainty. Ano: 2011 URL: http://purl.umn.edu/98733 Environmental and production cost impacts of no-till: Estimates from observed behaviour AgEcon Laukkanen, Marita; Nauges, Celine. No-till has been promoted as a cultivation method that reduces both production costs and the environmental impacts of farming relative to conventional tillage. Using farm-level data from Finland, we show that no-till has no statistically significant effect on total variable costs but that it increases the use of plant protection products and fertilizers, and decreases the use of labor. An environmental impact simulation combining the results on input use with a nutrient and herbicide runoff model predicts that no-till produces environmental benefits on highly erodible land, but may be even detrimental to the environment in average conditions. Tipo: Conference Paper or Presentation Palavras-chave: Conservation agriculture; No-till; Technology adoption; Agricultural and Food Policy; Farm Management; Land Economics/Use. Ano: 2010 URL: http://purl.umn.edu/61077 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 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 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 "No-Till" Farming Is a Growing Practice AgEcon Horowitz, John K.; Ebel, Robert M.; Ueda, Kohei. Most U.S. farmers prepare their soil for seeding and weed and pest control through tillage—plowing operations that disturb the soil. Tillage practices affect soil carbon, water pollution, and farmers’ energy and pesticide use, and therefore data on tillage can be valuable for understanding the practice’s role in reaching climate and other environmental goals. In order to help policymakers and other interested parties better understand U.S. tillage practices and, especially, those practices’ potential contribution to climate-change efforts, ERS researchers compiled data from the Agricultural Resource Management Survey and the National Resources Inventory-Conservation Effects Assessment Project’s Cropland Survey. The data show that approximately 35.5 percent... Tipo: Report Palavras-chave: Tillage; No-till; Agricultural Resource Management Survey; ARMS; U.S. crop practices; National Resources Inventory-Conservation Effects Assessment Project; NRI-CEAP; Carbon baseline; Carbon sequestration; Environmental Economics and Policy; Farm Management; Land Economics/Use; Resource /Energy Economics and Policy; Risk and Uncertainty. Ano: 2010 URL: http://purl.umn.edu/96636 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 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 Factors influencing adoption of conservation tillage in Australian cropping regions AgEcon D'Emden, Francis H.; Llewellyn, Rick S.; Burton, Michael P.. The purpose of this research is to improve understanding of conservation tillage adoption decisions by identifying key biophysical and socio-economic factors influencing no-till adoption by grain growers across four Australian cropping regions. The study is based on interviews with 384 grain growers using a questionnaire aimed at eliciting perceptions relating to a range of possible long- and short-term agronomic interactions associated with the relative economic advantage of shifting to a no-tillage cropping system. Together with other farm and farmer-specific variables, a dichotomous logistic regression analysis was used to identify opportunities for research and extension to facilitate more rapid adoption decisions. The broader systems approach to... Tipo: Article Palavras-chave: Adoption; Conservation tillage; Herbicide resistance; No-till; Perceptions; Weed management; Farm Management. Ano: 2008 URL: http://purl.umn.edu/118537 Estimating the Implicit Value of Crop Stubble as a Barrier to Technology Adoption in Morocco AgEcon Magnan, Nicholas; Larson, Douglas M.. For mixed cereal-livestock farmers, cereal production provides a bundle of goods. Grain is consumed by the household or sold at market, and crop residues are used as livestock feed. The straw component of crop residue can be bought and sold at market and therefore has a well-established local market price. Crop stubble, the portion of the crop residue left on the ground, is generally not traded and therefore has no market price. Some agricultural technologies require farmers to forgo using crop stubble as feed, and cultivation of high value crops entails sacrificing residue production altogether. In this paper we apply a structural econometric model to household data from Morocco to estimate the implicit value of crop stubble. We use a sample splitting... Tipo: Conference Paper or Presentation Palavras-chave: Mixed cereal-livestock systems; Non-market valuation; Land use; Technology adoption; No-till; International Development; Land Economics/Use; Livestock Production/Industries; O33; Q12; Q24. Ano: 2010 URL: http://purl.umn.edu/60858 Whole-Farm Evaluation of No-Till Profitability in Rice Production using Mixed Integer Programming AgEcon Watkins, K. Bradley; Hill, Jason L.; Anders, Merle M.; Windham, Tony E.. Rice production in Arkansas usually involves intensive tillage. No-till rice has been studied, but the focus has been limited to impacts on yields and per acre returns. This study uses mixed integer programming to model optimal machinery selection and evaluate whole-farm profitability of no-till management, for rice-soybean farms. Results indicate that lower machinery ownership expenses combined with lower fuel and labor expenses do enhance the profitability of no-till management, but the monetary gains appear to be modest, implying that other incentives may be necessary to entice producers to use the practice. Tipo: Journal Article Palavras-chave: Conventional till; Economies of size; Machinery complements; Mixed integer programming; No-till; Rice; Soybean; Whole-farm net returns; Farm Management; Q12; Q15; Q16; Q24; Q25. Ano: 2006 URL: http://purl.umn.edu/43792 ECONOMICS OF SEQUESTERING CARBON IN THE U.S. AGRICULTURAL SECTOR AgEcon Lewandrowski, Jan; Peters, Mark; Jones, Carol Adaire; House, Robert M.; Sperow, Mark; Eve, Marlen; Paustian, Keith H.. Atmospheric concentrations of greenhouse gases can be reduced by withdrawing carbon from the atmosphere and sequestering it in soils and biomass. This report analyzes the performance of alternative incentive designs and payment levels if farmers were paid to adopt land uses and management practices that raise soil carbon levels. At payment levels below $10 per metric ton for permanently sequestered carbon, analysis suggests landowners would find it more cost effective to adopt changes in rotations and tillage practices. At higher payment levels, afforestation dominates sequestration activities, mostly through conversion of pastureland. Across payment levels, the economic potential to sequester carbon is much lower than the technical potential reported in... Tipo: Report Palavras-chave: Carbon sequestration; Greenhouse gas mitigation; Afforestation; Conservation tillage; No-till; Incentive design; Leakage; Carbon stock; Permanence; Environmental Economics and Policy. Ano: 2004 URL: http://purl.umn.edu/33569 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 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 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 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 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 Registros recuperados: 34 Primeira ... 1 2 ... Última

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