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| Registros recuperados: 36 | |
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| Teixeira, Cícero Monti; Empresa de Pesquisa Agropecuária de Minas Gerais; Carvalho, Gabriel José de; Universidade Federal de Lavras; Silva, Carlos Alberto; Universidade Federal de Lavras; Andrade, Messias José Bastos de; Universidade Federal de Lavras; Paes, José Mauro Valente; Empresa de Pesquisa Agropecuária de Minas Gerais. |
| O objetivo foi avaliar o efeito das palhadas de milheto (Pennisetum typhoides (Burm.) Stapf) e milheto + feijão-de-porco (Canavalia ensiformes (L.) DC.) e diferentes doses de nitrogênio, na nutrição mineral do feijoeiro. O delineamento foi em blocos casualizados, com quatro repetições, em esquema de parcelas subdivididas, em Latossolo Vermelho, em plantio direto. As parcelas foram constituídas pelas palhadas e as subparcelas por um fatorial 2 x 4 + 1, representado por duas doses de N na semeadura (30 e 60 kg ha-1) e quatro em cobertura (0, 40, 80 e 120 kg ha-1), mais um tratamento adicional, correspondente a 30 kg ha-1 de N na semeadura, sem cobertura, com inoculação das sementes com Rhizobium tropici e aplicação foliar de Co e Mo. A palhada de milheto +... |
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Palavras-chave: 5.01.00.00-9 plantas de cobertura; Sistema plantio direto; Consórcio gramínea x leguminosa; Adubação nitrogenada; Fixação biológica de nitrogênio 5.01.01.03-0 cover crops; No-till; Grassy x leguminous intercropping; Nitrogen fertilizer; Biology nitrogen fixation. |
| Ano: 2010 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/4392 |
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| Sharifi, Ahmad; Sadeghnezhad, Hamid Reza; Faraji, Abolfazl. |
| Conservation tillage systems have been used during recent years in many areas of Iran. In this study, the effect of conservation tillage on soybean yield, yield components and phenological characteristics was evaluated in Golestan province located at the northern Iran. Four different treatments including conventional tillage (CT), minimum tillage (MT), no- tillage with no-till planter (NT-Planter) and no-tillage with no-till grain drill (NT-Grain Drill) were considered. A randomized complete block design with four replications was designed for the experiment. Soybean yield and yield components and some phenological characteristics were measured. Data were analyzed using SAS software and Duncan’s multiple range tests was used to compare the means. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Conservation tillage; Minimum tillage; No-till; Soybean. |
| Ano: 2016 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3544 |
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| Pauletti,Volnei; Serrat,Beatriz Monte; Motta,Antonio Carlos Vargas; Favaretto,Nerilde; Anjos,Adilson dos. |
| Two research fields were conducted on a Haplohumox from 1998 and to 2005. The study aimed to evaluate the strategies for starter fertilizer application on corn, soybean and common bean yield as well as the accumulation of earlier dry matter for corn in a no-tillage crop rotation system in south of Brazil. There was no increase in the yield of soybean with phosphorus and potassium application for at least seven seasons, while corn and common bean showed increased yields with phosphorus, potassium and nitrogen application. For soybean, corn and common beans in no-tillage systems with high levels of phosphorus and medium of potassium, the starter fertilizer can be applied in any of the methods evaluated and in any of the period considered. The presence or... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Starter fertilizer; Application technique; Fertilizer management; Crop rotation; No-till. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000300009 |
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| Densidade de semeadura e estresses durante o crescimento e desenvolvimento do milho; Rendimento de grãos de milho em sistemas de produção, sob plantio direto; Escolha de cultivar de milho; Efeito de sistemas de produção de grãos de milho na fertilidade do solo, sob plantio direto; Efeito de sistemas de produção de grãos de milho nos atributos físicos do solo, sob plantio direto; Principais doenças do milho; Insetos-praga da cultura do milho; Manejo e controle de plantas daninhas na cultura de milho, sob plantio direto; Silagem de milho; Conversão e balanço energético de sistemas de produção de grãos de milho, sob plantio direto; Análise econômica e de risco de sistemas de produção de grãos de milho, sob plantio direto. |
| Tipo: Livros |
Palavras-chave: Direct sowing; No-till; Corn. |
| Ano: 2007 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/821543 |
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| 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 |
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| 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 |
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| 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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| 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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| 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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| 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 |
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| 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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| 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 |
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| Registros recuperados: 36 | |
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