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| Bedene Szoke, Eva; Mohamed, Zsuzsanna. |
| Az általunk kidolgozott Biomassza Termelési Modell (BTM) lineáris programozáson alapul, és lehetővé teszi, hogy adott mezőgazdasági területre vonatkozóan meghatározzák az optimális vetésszerkezetet, különböző célfüggvények mellett. A különböző célfüggvények esetére vonatkozó optimalizálást a gazdasági környezet, különösen a szabályozó rendszer változása miatt tartottuk szükségesnek, amely adott körülmények között a legkedvezőbb gazdasági haszonnal jár. A döntés fő kérdése, hogy a rendelkezésre álló földterület és erőforrás-kapacitás mellett élelmiszercélú, vagy inkább energetikai célú hasznosítás irányában célszerű-e elmozdulni. --------------------------------------- We have developed a Biomass Production Model (BTM), which is based on linear programming.... |
| Tipo: Journal Article |
Palavras-chave: Biomassza-termelés; LP modell; Optimalizálás.; Biomass production; LP model; Optimisation; Land Economics/Use; Production Economics; Research Methods/ Statistical Methods. |
| Ano: 2010 |
URL: http://purl.umn.edu/99135 |
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| Okoye, Chukwuemeka U.. |
| In Nigeria 90% of the agricultural primary produce is in the hands of small holders cultivating between 0.8-4 hectares. Farm size expansion is limited by population pressure, land fragmentation, poor market opportunities and lack of finance. This article presents estimates of soil erosion control(SEC) and soil erosion damage costs (SEDC) in small farmers' fields in Nigeria and examines the contents and direction of the country’s agriculture and environment policies vis-à-vis the SEC among small farmers. It was found that 24% of the farmers’ spending on tillage/cultural practices was directed at the institution of SEC measures, and that SEC-related defensive expenditures was 3.7 times more than the estimated SEDCs. The capacity of small farmers to respond... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Soil erosion; Damage costs; Farm growth; Environmental Economics and Policy; Production Economics. |
| Ano: 2009 |
URL: http://purl.umn.edu/53079 |
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| Fabiosa, Jacinto F.. |
| The study finds that the emergence and expansion of the ethanol sector was associated with a fundamental transformation of the integration of the energy and agricultural sectors. In particular, the correlation structure between crude oil and grain prices increased dramatically, becoming more statistically significant, and with all anomalous signs corrected. Before the ethanol boom, the correlation of the crude oil price and corn was -0.117. It increased to 0.876 in the ethanol boom period. Soymeal correlation increased from 0.182 to 0.909, and distillers dried grains with solubles increased from -0.252 to 0.834. As a result, the energy market is also now impacting the livestock sector through feed costs, which account for more than half of total costs.... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Energy sector; Agricultural sector; Least-cost feed ration; Biofuel; Livestock Production/Industries; Production Economics; Q12; Q13; Q18. |
| Ano: 2009 |
URL: http://purl.umn.edu/49240 |
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| Goeringer, L. Paul; Goodwin, Harold L., Jr.; Dixon, Bruce L.; Popp, Michael P.. |
| America’s agricultural producers continue to age. According to the U.S. Census of Agriculture, the average age of farm operators increased from 55.3 in 2002 to 57.1 in 2007. During the same period, the Census shows a thirty percent decrease in the number of farmers under the age of 25. Young and beginning producers (YBPs) entering agriculture can be faced with high startup costs and the lack of land to own or rent. To address this potential shortage of future farmers, we propose a program for the Farm Credit System to assist YBPs by offering Farm Service Agency guaranteed loans. In this program YBPs are given concessionary interest rates in consideration for adopting conservation and recommended “best” practices. To gauge the impact of the loan... |
| Tipo: Presentation |
Palavras-chave: Agribusiness; Agricultural Finance; Farm Management; Production Economics. |
| Ano: 2012 |
URL: http://purl.umn.edu/124427 |
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| Brennan, John P.; Bialowas, Adam. |
| A study was made of the changes from 1965 to 1997 in wheat varieties grown in selected shires representing farming systems across NSW. The eight shires examined were Wagga, Temora, Cowra, Carrathool, Lachlan, Coonabarabran, Gunnedah and Narrabri. In each shire, approximately 8-10 varieties were grown each year. Generally, three of those varieties were grown on a substantial proportion of the area; the minor varieties were either new varieties in the process of being built up to their peak adoption or older varieties in the stage of being replaced. In southern shires, there has been a tendency to reduce the number of varieties grown, while in the northern shires the number of varieties grown has increased since 1965. The progress of breeders in developing... |
| Tipo: Report |
Palavras-chave: Production Economics. |
| Ano: 2001 |
URL: http://purl.umn.edu/28003 |
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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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| Cao, Kay; Maurer, Oswin; Scrimgeour, Frank G.. |
| In New Zealand, the Animal Products Act 1999 requires all animal product processing businesses to have a HACCP-based risk management program by the end of 2002. This paper attempts to measure the effects of such regulation on the variable cost of production of the New Zealand seafood industry. Using the framework developed by Antle (2000), a model of quality-adjusted translog cost function is estimated using census of production data from 1929 to 1998. Our results show that variable costs could increase from 2% to 22% or from 2 cents to 19 cents per kilogram. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: HACCP; Compliance costs; Seafood; Production Economics. |
| Ano: 2003 |
URL: http://purl.umn.edu/57840 |
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| Yang, Seung-Ryong; Koo, Won W.; Wilson, William W.. |
| This study examines three alternative models of correcting for heteroskedasticity in wheat yield: the time trend variance, the GARCH, and an econometric model that includes the potential sources of heteroskedasticity. Nonnested test results suggest that modeling the sources of heteroskedasticity is the preferred procedure. Including potential sources of heteroskedasticity as explanatory variables removed the heteroskedasticity in the sample wheat yields. The results also suggest that the GARCH specification is a promising model of correcting for heteroskedasticity when the sources cannot be identified. The time trend variance model alone may misspecify the true variance structure. |
| Tipo: Journal Article |
Palavras-chave: Production Economics; Research Methods/ Statistical Methods. |
| Ano: 1992 |
URL: http://purl.umn.edu/30738 |
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| Registros recuperados: 1.491 | |
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