|
|
|
| Registros recuperados: 59 | |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
|
| Keplinger, Keith O.; Hauck, Larry M.. |
| A model of manure utilization is developed and applied to four types of transportable manure. Model results highlight important response differences among manure types and generally illustrate the diseconomies of manure production. For example, as manure production increases, manure value decreases and excess phosphate applications increase, thereby increasing the potential for phosphorus runoff. Policy scenarios limiting the manure application rate reduce manure value and excess phosphate application. Increasing the ratio of land using manure increases manure value while reducing excess phosphate application. Buildup of soil nutrients reduces manure value, but either increases or decreases excess phosphate application depending on the scenario. |
| Tipo: Journal Article |
Palavras-chave: Linear programming; Manure application; Manure transportation; Manure utilization; Manure value; Optimization; Farm Management. |
| Ano: 2006 |
URL: http://purl.umn.edu/8611 |
| |
|
| |
|
|
| Kerselaers, Eva; Govaerts, Wim; Lauwers, Ludwig H.; De Cock, Lieve; Van Huylenbroeck, Guido. |
| A farm model is developed for simulating the potential income change resulting from conversion to organic farming. The model uses conventional farm data, taken from the Belgian FADN. Given the normative character of the model, and the impossibility of calibration to historical conversion behaviour, two model variants, a rigid and a flexible, are created to broaden the analysis scope. Moreover, extra attention is paid to the verification process and sensitivity analysis. Results reveal that the economic potential for conversion is rather high, if farmers are willing to change their farm management sufficiently. Furthermore, conversion potential depends on the farm type and conventional farm characteristics. The model finally proves to be an interesting tool... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Organic farming; Conversion period; Farm model; Linear programming; Environmental Economics and Policy; Farm Management; C61; Q12. |
| Ano: 2005 |
URL: http://purl.umn.edu/24732 |
| |
|
|
| Keil, Alwin; Teufel, Nils; Gunawan, Dodo; Leemhuis, Constanze. |
| Crop production in the tropics is subject to considerable climate variability caused by the El Niño-Southern Oscillation (ENSO) phenomenon. In Southeast Asia, El Niño causes comparatively dry conditions leading to substantial declines of crop yields with severe consequences for the welfare of local farm households. Using a modelling approach that combines regression analysis with linear programming and stochastic simulation, and integrates climatic and hydrologic modelling results, the objective of this paper is to assess the impact of El Niño on agricultural incomes of smallholder farmers in Central Sulawesi, Indonesia, and to identify suitable crop management strategies to mitigate the income depressions. The results contribute to the formulation of... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: ENSO; Risk management; Linear programming; Stochastic simulation; Indonesia; Farm Management. |
| Ano: 2007 |
URL: http://purl.umn.edu/7942 |
| |
|
|
| Wachenheim, Cheryl J.; Novak, Patrick J.; DeVuyst, Eric A.; Lambert, David K.. |
| Co-products of processing agricultural commodities are often marketed through private transaction rather than through public markets or those in which public transaction information is recorded or available. The resulting lack of historical price information prohibits the use of positive time series techniques to estimate demand. Demand estimates for co-products are of value to both livestock producers, who obtain them for use in livestock rations, and processors, who must sell or otherwise dispose of them. Linear programming has long been used, first by researchers and later as a mainstream tool for nutritionists and producers, to formulate least-cost livestock rations. Here it is used as a normative technique to estimate step function demand... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Co-products; Demand estimation; Econometrics; Linear programming; Agribusiness. |
| Ano: 2001 |
URL: http://purl.umn.edu/23488 |
| |
|
| |
|
|
| Hoag, Dana L.; Conradie, Beatrice. |
| In this paper the incremental values of water are calculated for irrigators in the Fish-Sundays Scheme of South Africa's Eastern Cape province. The socio-political pressure for redistribution of agricultural resources provided the imperative for this study. The model of the Fish-Sundays Scheme reflects a survey of 50 000ha of fodder and citrus production. It explicitly models the water demand on sixteen typical farms, for five irrigation technologies, six crops and four livestock activities. The existing allocation generates an average value of R0.0423/m3/year, which increases to R0.0681/m3/year if farmer-to-farmer trading is allowed given existing infrastructure. Unrestricted trade raises the average value to R0.0719/m3/year. The marginal cost of... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Water value; Irrigation; Linear programming; South Africa; Eastern Cape; Resource /Energy Economics and Policy; Q15; Q12. |
| Ano: 2003 |
URL: http://purl.umn.edu/25832 |
| |
|
| |
|
|
| Resende Filho, Moises de Andrade; Araujo, Felipe Augusto de; Barros, Emanoel de Souza; Silva, Alexandre Stamford Da. |
| O aumento da pressão sobre os recursos hídricos tem levado muitos países a reconsiderarem os mecanismos utilizados na indução do uso eficiente da água. Isso é especialmente verdade para a agricultura irrigada, uma das principais consumidoras de água. Estabelecer o preço correto da água é um dos mecanismos de tornar mais eficiente a alocação da água. Contudo, precificar a água ainda é uma tarefa polêmica. Assim, o presente estudo aplica o método paramétrico de estimação de uma função insumo-distância na obtenção do preço-sombra ou disposição da firma a pagar por uma unidade adicional de água. São utilizados dados sobre a produção, área irrigada, utilização de insumos diversos, mão-de-obra, capital e volume de água obtidos de 41 unidades produtivas... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Disposição a pagar pela água; Precificação da água; Programação linear; Willingness to pay for water; Water pricing; Linear programming; Crop Production/Industries; Resource /Energy Economics and Policy. |
| Ano: 2008 |
URL: http://purl.umn.edu/112738 |
| |
|
|
| Oliveira, Gabriel Leao; Vieira, Wilson da Cruz. |
| The main objective of this work was to analyze the trade between income and risk related to the alternative milk production systems in the region of Viçosa, Minas Gerais, supported by the Federal University of Viçosa and Nestlé. A standard linear programming model provided the identification of the best options among the activities displayed for the maximization of the gross annual income. By means of the rentability calculation of the different milk production systems and risk linked to them it was possible to identify that the milk producers behaved differently in relation to the risk. Generally the producers who are more dependent to the milk activity for their survival are more adverse to risk. |
| Tipo: Journal Article |
Palavras-chave: Risk; Linear programming; Milk production.. |
| Ano: 2006 |
URL: http://purl.umn.edu/43811 |
| |
|
| |
|
| |
| Registros recuperados: 59 | |
|
|
|
