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Is geographic diversification sufficient to limit contract grower risk? AgEcon
Geyser, Mariette; Louw, Andre; Botha, L..
Lending and financial institutions have looked for a variety of ways to expand their portfolios into agriculture, but because of the risks associated with lending to farmers who lack traditional forms of collateral, they face price and yield risks, causing these inroads to be limited. Market-based instruments are readily available for price risk. Organised exchanges offering the most basic of these instruments, futures and options, have operated for a long time, providing transparency to the market and low-cost risk transfer tools for those able to access them. While the use of price risk management instruments is an incomplete solution, it has sufficient merits on its own and will make the overall burden of risk more bearable. The use of these instruments...
Tipo: Journal Article Palavras-chave: Geographic diversification; Contract grower; Risk; Lending; Rainfall; Yield; Agricultural Finance.
Ano: 2009 URL: http://purl.umn.edu/49163
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O que significam as medidas de produtividade da agricultura? AgEcon
Alves, Eliseu Roberto de Andrade.
Some productivity measures area analyzed. The emphasis is on concepts, limitations and on some empirical results. Software is not discussed. The productivity measures are classified in optimized, whenever obtained by an optimization procedure, and not optimized, as yield, labor productivity and total factor productivity (ptf). The work shows when yields and total factor productivity say the same thing to conclude that this is possible only in a primitive agriculture where labor and land are the only factors of production used. This type of agriculture is present only in backward regions of Brazil. Hence yield, except in this situation, is a poor measure of profitability. Empirical works show that the development of Brazilian agriculture follows a path of...
Tipo: Journal Article Palavras-chave: Yield; Labor Productivity; Total Factor Productivity; Technical Efficiency; Production Frontier; Production Economics.
Ano: 2010 URL: http://purl.umn.edu/102083
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Enhancing food and livelihood security in the context of the food and financial crisis: challenges and opportunities for small scale rainwater harvesting and conservation AgEcon
Baiphethi, Mompati N.; Viljoen, Machiel F.; Kundhlande, Godfrey; Ralehlolo, N.G..
The world recently experienced the food and financial crisis. The food crisis was an indicator of the challenges towards sufficiently feeding an increasing world population. Food production through rainfed and irrigated agriculture account for the bulk of the freshwater used globally but the water is still sufficient to meet the MDG goal on hunger reduction. Agricultural water management is thus an important challenge for feeding humanity; creates the need to find sustainable methods of managing water that will include all water users. Some of these methods include rainwater harvesting which has great potential in increasing food production as compared to irrigation. This paper aims to identify challenges and opportunities for small scale rainwater...
Tipo: Journal Article Palavras-chave: Food security; Livelihoods; Rainwater harvesting; Household; Yield; Food Security and Poverty; Resource /Energy Economics and Policy.
Ano: 2010 URL: http://purl.umn.edu/96640
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Quais as Perspectivas da Produção de Biodiesel de Mamona no Nordeste Brasileiro? AgEcon
Vaz, Paulo Henrique Pereira De Meneses; Sampaio, Yony.
O objetivo desse artigo é analisar as condições necessárias para o desenvolvimento do PNPB (Programa Nacional de Produção e Uso do Biodiesel) no nordeste brasileiro. A metodologia utilizada é essencialmente prospectiva, considerando o custo de oportunidade da produção de mamona para os agricultores familiares para avaliar como se comportam diante de variações de preço e produtividade da mamona, apontada como insumo mais adequado para o Biodiesel da região. Os resultados encontrados apontam para a necessidade de incrementos no nível de produtividade da cultura a fim de incentivar maior participação da agricultura tradicional. Há indícios de que uma média de produção próxima de 1ton/ha tornaria o plantio dessa oleaginosa viável para maior parte desses...
Tipo: Conference Paper or Presentation Palavras-chave: Mamona; Biodiesel; Produtividade; Agricultura familiar; Viabilidade econômica; Castor beans; Biodiesel; Yield; Family agriculture; Economic viability; Crop Production/Industries; Resource /Energy Economics and Policy.
Ano: 2008 URL: http://purl.umn.edu/108162
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THE EFFECTS OF RESEARCH ON WHEAT YIELDS AND YIELD VARIANCES AgEcon
He, Senhui; White, Fred C.; Fletcher, Stanley M..
This paper investigates the impacts of research investment on wheat production. A two-way error component random effect model was estimated using panel data to examine the effects of research investment on mean yield and yield variance. Results show that, for the time period between 1974 and 1995, research investment enhanced yield stability but had no significant impact on mean yield. Key words: yield, yield variance, research investment.
Tipo: Conference Paper or Presentation Palavras-chave: Yield; Yield variance; Research investment.; Crop Production/Industries.
Ano: 2003 URL: http://purl.umn.edu/35155
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Üszőellések elkülönített elszámolásának hatása az eredményre és a vagyonra AgEcon
Abel, Ildiko; Hoffmann, Andras.
Megvizsgáljuk, hogy a borjak számviteli törvénynek megfelelő elszámolása hogyan hat az önköltségre, az eredményre és a vállalkozás vagyonára. Megállapítható, hogy az előhasi üszőktől született borjak növendékállományon belül történő elszámolásának hatása vagyont és eredményt csökkentő tételként jelentkezik. Azt, hogy az elszámolásban keletkező különbözet milyen arányban jelenik meg vagyont és eredményt csökkentő tételként, azt a korosbítás gyakorlata is jelentősen befolyásolja. Ha az állományt már az első korcsoport után szétválasztják, akkor nagyobb hányad kompenzálja a tejre jutó költségnövekedést és kisebb lesz a vagyoncsökkenés. ------------------------------------------------------ This study focuses on how recording of calves in accordance with the...
Tipo: Journal Article Palavras-chave: Tehenészet; Üszőellés; Élőtömeg-önköltség; Hozam; Cow farm; Heifer birthing; Live mass net cost; Yield; Farm Management; Livestock Production/Industries.
Ano: 2010 URL: http://purl.umn.edu/99173
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Efficiency analysis of a sheep farm AgEcon
Vincze, Judit; Tenk, Antal.
Our study shows an analysis of a sheep farm. The present farm was chosen for analysis due to the fact that it is run under special natural conditions and as for the sheep farming, it has quite a few non-typical features. These raise some economic issues, which have to be analysed, questions have to be answered that may result in useful conclusions. Since sheep farming does not seem to be able to overcome its difficulties on its own, the EU support system could give the initial step necessary for the success and would also help to sustain sheep farms. The amount of grant that is usual in the EU could provide for the sustainability of this sector, the relative safety of sales, the equal chances of the farms operating under different capabilities and if...
Tipo: Journal Article Palavras-chave: Ewe; Production cost; Yield; Production value; Results of sector; Agricultural and Food Policy; Livestock Production/Industries; Production Economics.
Ano: 2007 URL: http://purl.umn.edu/51953
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Pigeonpea improvement AgEcon
Ryan, James G..
This study was commissioned by the Australian Centre for International Agricultural Research (ACIAR) to evaluate the economic impact of two projects (8201 and 8567) for which ACIAR provided support from 1982–89. These projects were aimed at the improvement of the grain yield potential of pigeonpea (Cajanus cajan) using modern plant breeding, along with associated physiological, agronomic, processing and socioeconomic research. The commissioned organisation in Australia was the University of Queensland. The partners were: Fiji (Ministry of Primary Industries, Native Land Development Corporation); Indonesia (Central Research Institute for Food Crops, Agency for Agricultural Research and Development); India (Indian Council for Agricultural Research,...
Tipo: Book Palavras-chave: Pigeonpea; ACIAR; Economic impact; Yield; Plant breeding; Fiji; Indonesia; India; Thailand; Australia; Agribusiness; Agricultural and Food Policy; Crop Production/Industries; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; International Development; Production Economics.
Ano: 1998 URL: http://purl.umn.edu/47498
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RESEARCH REGARDING OIL SEEDS CROPS DEVELOPMENT IN ROMANIA IN THE EU CONTEXT AgEcon
Popescu, Agatha.
Professional paper
Tipo: Article Palavras-chave: Rape; Soybean; Sunflower; Cultivated area; Yield; Production; Romania; Agribusiness; Crop Production/Industries; Q10; Q01.
Ano: 2012 URL: http://purl.umn.edu/123964
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A Revenue-Based Alternative to the Counter-Cyclical Payment Program AgEcon
Cooper, Joseph C..
This paper develops a stochastic model for comparing payments to U.S. corn producers of a revenue-based counter-cyclical payment (R-CCP) that is offered as an alternative in the 2007 House "Farm Bill" (H.R. 2419) to the current price-based CCP (P-CCP). We minimize the potential for miss-specification bias in the model by using nonparametric and semi-nonparametric approaches as specification checks in the model. Using this model, the paper examines the sensitivity of the density function for payments to changes in expected price levels. A mean-variance utility function approach is used to assess producer preferences for choice of CCP program alternative. The results show that as risk reduction instruments at the farm level, there appears to be little...
Tipo: Conference Paper or Presentation Palavras-chave: Domestic support; Counter-cyclical payments; Revenue; Price; Corn; Yield; Pairs bootstrap; Kernel density; Semi-nonparametric; Combinatorial optimization; Agricultural and Food Policy; Crop Production/Industries.
Ano: 2008 URL: http://purl.umn.edu/6197
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Maize Yield Response to Fertilizer and Profitability of Fertilizer Use Among Small-Scale Maize Producers in Zambia AgEcon
Xu, Zhiying; Govereh, Jones; Black, J. Roy; Jayne, Thomas S..
Multi-year nationwide survey data is used to estimate maize yield response functions and determine profitability of fertilizer use by small-scale farmers in Zambia. There has been a dearth of empirical studies on economics of fertilization in the context of Sub-Saharan Africa. In this paper we identify major methodological issues arising from using survey data and estimate maize yield response functions for small-scale rural households that have various management practices and soil conditions in two major agro-climatic zones. Profitability of fertilizer use is determined for each group of households. Our findings provide the following key messages. First, households that obtained fertilizer on time and used animal draught power or mechanical power for...
Tipo: Conference Paper or Presentation Palavras-chave: Maize; Yield; Fertilizer; Profitability; Survey data; Crop Production/Industries.
Ano: 2006 URL: http://purl.umn.edu/25730
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ACRE: A Revenue-Based Alternative to Price-Based Commodity Payment Programs AgEcon
Cooper, Joseph C..
This paper develops a stochastic model for estimating the probability density function of the Average Crop Revenue Election (ACRE), a revenue-based commodity support payment that is offered under the 2008 Farm Act as an alternative to the traditional suite of price-based commodity payments, that is, marketing loan benefits and counter-cyclical payments. We minimize the potential for miss-specification bias in the model by using nonparametric and semi-nonparametric approaches as specification checks in the model. Our simulation results show that adding ACRE revenue payments to gross revenue reduced the downside risk in revenue for corn, wheat, and soybean farmers in 2009 in the four locations examined, with reductions ranging from 4% to 25%. Integrating...
Tipo: Conference Paper or Presentation Palavras-chave: Domestic support; Average crop revenue election; Loan deficiency payments; Counter-cyclical payments; Revenue; Price; Corn; Yield; Pairs bootstrap; Kernel density; Semi-nonparametric; Combinatorial optimization; Negative exponential utility function; Agricultural and Food Policy; Demand and Price Analysis.
Ano: 2009 URL: http://purl.umn.edu/49180
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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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Factors Influencing Wheat Yield and Variability: Evidence from Manitoba, Canada AgEcon
Carew, Richard; Smith, Elwin G.; Grant, Cynthia.
Production functions to explain regional wheat yields have not been studied extensively in the Canadian prairies. The objective of this study is to employ a Just-Pope production function to examine the relationship between fertilizer inputs, soil quality, biodiversity indicators, cultivars qualifying for Plant Breeders’ Rights (PBR), and climatic conditions on the mean and variance of spring wheat yields. Using regional-level wheat data from Manitoba, Canada, model results show nitrogen fertilizer, temporal diversity, and PBR wheat cultivars are associated with increased yield variance. Mean wheat yield is reduced by the proportion of land in wheat, the interaction of growing temperature and precipitation, and spatial diversity. By contrast, higher soil...
Tipo: Journal Article Palavras-chave: Climate; Fertilizer; Manitoba; Plant Breeders’ Rights; Production risk; Wheat; Yield; Agribusiness; Crop Production/Industries; Farm Management; Land Economics/Use; Productivity Analysis; Risk and Uncertainty; O18; Q16.
Ano: 2009 URL: http://purl.umn.edu/56649
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DETERMINACIÓN DE LA RENTABILIDAD DE LA PRODUCCIÓN DE OVINOS RAZA PELIBUEY EN EL NORTE DE SONORA AgEcon
Retes Lopez, Rafael; Dominguez Canizales, Karla; Moreno Medina, Salomon; Denogean Ballesteros, Francisco G.; Ibarra Flores, Fernando A.; Martin Rivera, Martha H..
The feeding and the shelter are considered basic needs of the man and one of the options to satisfy them is through the lambs which contribute to cover them with their meat, wool and skin. For the analysis of the yield a flock took itself from twenty females and a stallion one of Pelibuey race and was developed in conditions of semiestabulado and artificial prairie with oats and rye grass in the north of the State of Sonora.Several indicators were taken to carry out the determination of the yield taking in first instance the capital of work, point of balance, sensitivity analysis as well as the relation benefit-cost. In the case of first the amount of 109.650,44 like so was determined whereas the balance point obtains as of the second period of 270 days...
Tipo: Article Palavras-chave: Lambs; Yield; Capital of work; Analysis; Benefit-cost.; Agribusiness.
Ano: 2012 URL: http://purl.umn.edu/120497
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Modeling in the Adjustment of Fertilization Recommendation through Leaf Analysis in Fertigated ‘Prata’ Banana Rev. Bras. Ciênc. Solo
Deus,José Aridiano Lima de; Neves,Júlio César Lima; Soares,Ismail; Alvarez V.,Víctor Hugo; Albuquerque,Fabricio Martinazzo Regis de; Santos,Lauana Lopes dos; Natale,William.
ABSTRACT: In banana cultivation, fertilization recommendations are almost exclusively based on soil chemical analysis, without considering leaf analysis and expected yield, which can help in the adjustment of fertilization programs. The aim of this study was to develop a method to recommend macronutrient fertilization rates which integrates data on leaf analysis, soil chemical analysis, and yield. Yield, soil chemical analysis, and leaf analysis data of fertigated plantations of ‘Prata’ banana were obtained for the first and second halves of the years from 2010 to 2015. Yield was correlated with soil organic matter (SOM) and soil contents of macronutrients (P, K, Ca, and Mg) to obtain the critical level (CLNui). Then, leaf nutrient contents were plotted on...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Musa spp.; Nutrient; Critical level; Boundary line; Yield.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100532
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Ammonia volatilization from nitrogen fertilizers in no-till wheat and maize in southern Brazil Rev. Bras. Ciênc. Solo
Viero,Fernando; Bayer,Cimélio; Fontoura,Sandra Mara Vieira; Moraes,Renato Paulo de.
Crop residues on the soil surface of no-till systems can intensify ammonia volatilization from N fertilizers applied to cereal crops. This study assessed the magnitude of N losses through ammonia volatilization from urea applied to no-till winter (wheat) and summer crops (maize) on a Typic Hapludox in the south-central region of Paraná, southern Brazil. In addition, the potential of alternative N sources (urea with urease inhibitor, liquid fertilizer, ammonium nitrate and ammonium sulfate) and different urea managements (fertilizer applied in the morning or afternoon) were evaluated. Two experiments with maize and wheat were carried out for two years, arranged in a randomized block design with four replications. Nitrogen volatilization losses were assessed...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Nitrogen fertilization; Efficiency; Yield.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000500017
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Pig slurry and nutrient accumulation and dry matter and grain yield in various crops Rev. Bras. Ciênc. Solo
Lourenzi,Cledimar Rogério; Ceretta,Carlos Alberto; Brunetto,Gustavo; Girotto,Eduardo; Tiecher,Tadeu Luis; Vieira,Renan Costa Beber; Cancian,Adriana; Ferreira,Paulo Ademar Avelar.
Pig slurry (PS) represents an important nutrient source for plants and using it as fertilizer makes greater nutrient cycling in the environment possible. The aim of this study was to assess how PS application over a period of years can affect grain yield, dry matter production and nutrient accumulation in commercial grain and cover crops. The experiment was carried out in an experimental area of the Universidade Federal de Santa Maria, in Santa Maria, RS, Brazil, from May 2000 to January 2008. In this period, 19 grain and cover crops were grown with PS application before sowing, at rates of 0, 20, 40 and 80 m³ ha-1. The highest PS rate led to an increase in nutrient availability over the years, notably of P, but also of nutrients that are potentially toxic...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Manure; Yield; Crop rotation.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000300027
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Biometric Responses of Soybean to Different Potassium Fertilization Management Practices in Years with High and Low Precipitation Rev. Bras. Ciênc. Solo
Esper Neto,Michel; Minato,Evandro Antonio; Besen,Marcos Renan; Inoue,Tadeu Takeyoshi; Batista,Marcelo Augusto.
ABSTRACT Brazilian soybean producers commonly apply maintenance potassium (K) fertilization during cultivation to restore the K taken up by plants; however, this measure can modify the morphophysiological plant characteristics, since the functions of K are closely related with plant growth and development. This study assessed the morphological changes in soybean plants in response to K rates, sowing fertilization, and the application periods of K fertilization in a Latossolo Vermelho eutroférrico (Oxisol) under a no-tillage system, located in the municipality of Floresta, Paraná. A randomized block design was used in the experiment with four replications in a fully crossed factorial design (5 × 2 × 2). The experiment was carried out in two growing seasons...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Leaf area index; Correlation; Yield; Drought.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100525
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Defoliation percentage in two soybean cultivars at different growth stages AGRIAMBI
Glier,Cláudio A. da S.; Duarte Júnior,José B.; Fachin,Gabriel M.; Costa,Antonio C. T. da; Guimarães,Vandeir F.; Mrozinski,Chrismam R..
ABSTRACT The objective of this study was to evaluate the agronomic variables due to the effects of different levels of defoliation in the phenological phases of two soybean cultivars. The experiment was conducted during the 2011/2012 season, in a randomized block design with three replicates, in a 2 x 4 x 5 factorial scheme. Two cultivars were exposed to defoliations of 0, 25, 50, 75 and 100% at the stages of V4, V9, R3 and R5. The cultivar 'NK 7059RR' showed less sensitivity to defoliation than the cultivar 'IN 4990RG'. 25% defoliation levels reduced the yield of the cultivar 'IN 4990RG', while levels of 75 and 100% reduce the number of grains per pod in both cultivars. The defoliation performed in the V4 stage lead to lower grain yield than defoliation...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Glycine max L.; Yield; Leaf area indices.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662015000600567
Registros recuperados: 413
Primeira ... 789101112131415 ... Última
 

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