|
|
|
| Registros recuperados: 158.175 | |
|
|
| Brozovic, Nicholas; Islam, Shahnila. |
| In recent years there has been increasing regulation of agricultural water use in order to reduce transboundary and environmental water conflicts. Effective policy analysis needs to have tools to estimate correctly the value of irrigation water. Irrigating land increases crop yields and this higher profitability should be capitalized into the sales price of the land. For irrigation that depends on surface water rights, studies have found this to be the case (Xu et al. 1993, Faux and Perry 1999). However, studies that have analyzed the value of groundwater in irrigation have found mixed results. Hartman and Taylor (1989) and Sunderland, Libbin and Torell (1987) find that groundwater irrigation has no significant effect on land prices; Torrell et al. (1990)... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Groundwater; Hedonics; Propensity score matching; Environmental Economics and Policy. |
| Ano: 2010 |
URL: http://purl.umn.edu/61337 |
| |
|
|
| Olson, Kent D.; Badibanga, Thaddee Mutumba. |
| Since its first detection in the North Central region in July 2000, the soybean aphid (Aphis glycines Matsamura) has caused considerable loss in soybean (Glycine max L.) yield, bean quality, and producer income. Discovered first in Wisconsin and then in adjoining states, it is currently distributed in 21 US states and parts of Canada. In 2003, over 42 million acres of soybean in the North Central US were infested and over 7 million acres were treated with insecticides to control soybean aphid (Landis et al. 2003). Populations exceeding 24,000 aphids per plant and 40% losses in seed yield have been reported (DiFonzo & Hines 2002). Even prior to the outbreak of 2003, the Soybean Strategic Pest Management Plan identified soybean aphid as one of the key... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Soybean aphid; Bioeconomic model; Farm Management. |
| Ano: 2005 |
URL: http://purl.umn.edu/19237 |
| |
|
|
| Dun, Zhe; Mitchell, Paul D.. |
| Transgenic plants producing insecticidal protein derived from Bacillus thuringiensis (Bt) have been widely adopted since their commercial introduction in 1996. In 2009, 25 countries planted 134 million ha of transgenic crops. The widespread adoption of such plants has reduced use of conventional insecticides while attaining yield gains, thus providing economic, environmental and human health benefits. Because of Bt crops’ high pest control efficacy, there is concern that pests will develop resistance to Bt toxins so that Bt crops are less or no longer effective. To delay the evolution of resistance, the U.S. Environmental Protection Agency (EPA) currently requires Bt crop growers to also plant non-Bt (conventional) crops on a minimum percentage of their... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Welfare; Bt; Pest suppression; Agricultural and Food Policy; Crop Production/Industries. |
| Ano: 2011 |
URL: http://purl.umn.edu/103584 |
| |
|
|
| Kapronczai, Istvan. |
| A „Gazdálkodás” 2010. évi 2. számában vitacikkem jelent meg „A földbirtok-politikaválaszt igénylő kérdései” címen. Ezzel az volt a célom, hogy a témakörrel kapcsolatban felvessek kérdéseket, leírjak megállapításokat, és ezzel egy olyan vitát generáljak, ami fórumot ad a tudományos közélet szereplőinek a megszólalásra, a vélemények ütköztetésére, egymás nézeteinek jobb megértésére, a politika számára javaslatok megfogalmazására. A vitában az agrárgazdaságtan, üzemtan képviselői és mások kifejthették a véleményüket olyan fontos birtokpolitikai kérdésekkel kapcsolatban, mint a földtulajdon, a földhasználat, a földbérlet, a földpiac, a mezőgazdasági üzemszabályozás, a tagosítás, a föld öröklése, a külföldiek földhöz jutása, az... |
| Tipo: Article |
Palavras-chave: Birtokpolitika; Földtulajdon; Földbérlet; Földhasználat; Üzemszabályozás; Agricultural and Food Policy; Land Economics/Use; Land estate policy; Land ownership; Land lease; Land use; Regulation of agricultural businesses. |
| Ano: 2011 |
URL: http://purl.umn.edu/119890 |
| |
|
| |
|
|
| Klonsky, Karen; Greene, Catherine R.. |
| Organic food production has rapidly growing consumer demand in the U.S. and other industrialized countries, along with a worldwide regulatory framework and rapidly developing support infrastructure, making it a premier technology in the efforts of many public and private organizations that advocate more sustainable farming practices. The use of organic farming systems for crop production in the U.S. has grown rapidly during the last decade, but is still under 0.5 percent of total U.S. farmland-substantially less than in many countries in Europe and elsewhere. Within the U.S., conversion to organic farming systems has been more extensive in particular commodity sectors and regions. In California, for example, about two percent of the state's crop... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Organic agriculture; Farm policy; Consumer demand; Marketing. |
| Ano: 2005 |
URL: http://purl.umn.edu/19382 |
| |
|
|
| Gruere, Guillaume P.; Bouet, Antoine; Mevel, Simon. |
| In the last eleven years, the global production of genetically modified (GM) crops has increased dramatically. Yet more than 95% of GM crops are produced in four countries: the United States, Argentina, Canada and China. During the same period, a group of countries with consumer opposition to GM food, lead by the European Union (EU) and Japan, have implemented stringent policies regulating the approval and import of GM crops and the marketing of GM food. In the context of increased international agricultural trade, the regulations of these importers and the lack of demand for GM food in these countries likely limited the expansion of agricultural biotechnology to many developing countries. Cohen and Paarlberg (2002) argued that the restricted adoption and... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: International Relations/Trade; Research and Development/Tech Change/Emerging Technologies. |
| Ano: 2007 |
URL: http://purl.umn.edu/9917 |
| |
|
| |
|
| |
|
|
| Pinstrup-Andersen, Per; Pandya-Lorch, Rajul; Rosegrant, Mark W.. |
| About 73 million people will be added to the world’s population every year between 1995 and 2020, increasing it by 32 percent to reach 7.5 billion. Much of this population growth will occur in the cities of the developing world. While its rural population is expected to increase by less than 300 million during this period, the developing world’s urban population could double to 3.4 billion in 2020. Per capita incomes are expected to increase in all major developing regions over this period. Meeting the food needs of a growing and urbanizing population with rising incomes will have profound implications for the world’s agricultural production and trading systems in coming decades. IFPRI research suggests some of the major developments that will characterize... |
| Tipo: Report |
Palavras-chave: Food Security and Poverty. |
| Ano: 1999 |
URL: http://purl.umn.edu/42572 |
| |
|
|
| Nordquist, Dale W.; Kurtz, James N.; Holcomb, Rob; Paulson, Garen J.. |
| Average net farm income was $154,698 in 2006 for the 110 farms included in this annual report of the Southwestern Minnesota Farm Business Management Association. This is a 5% increase over the average income of $147,862 in 2005. In constant dollars, 2006 was slightly more profitable than the previous year and was again one of the most profitable years in the last 20 for association members (Figure 1). Outstanding crop prices coupled with above average crop yields more than compensated for reduced profitability of hog and beef enterprises. As in previous years, the actual profit levels experienced by individual farms vary greatly from the overall average profit. When the net farm incomes for the 110 farms in the report are ranked from lowest to highest,... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Agricultural Finance; Farm Management. |
| Ano: 2007 |
URL: http://purl.umn.edu/7307 |
| |
|
|
| Quisumbing, Agnes R.; McNiven, Scott. |
| Migration is an important livelihood strategy in the Philippines. In 1991, 26 percent of urban households and 13 percent of rural households received remittances from migrant parents or children. Although international migration has received more attention than internal migration, the latter is significant in the Philippines. Between 1980 and 1990, the number of persons over the age of five years who were not resident in the city or municipality they resided in five years ago, increased from 2.85 to 3.24 million. Recent migration flows are interprovincial, typically in the direction of Metropolitan Manila and surrounding areas, and are dominated by women. While the percentage of the population classified as urban increased... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Migration; Rural; Urban; Philippines; International Development; Labor and Human Capital. |
| Ano: 2005 |
URL: http://purl.umn.edu/59599 |
| |
|
|
| Unterschultz, James R.. |
| EXECUTIVE SUMMARY The Canadian beef industry has stated objectives of improving beef quality and consumer satisfaction while reducing unit costs of production. Suggested methods for achieving these goals include working towards value based marketing and improved information flows between different market levels through systems such as a birth to plate information system. These initiatives are designed to provide a more direct link between consumer product needs and breeding and management decisions at the farm level. The industrialization of agriculture has introduced a number of changes to the structure of livestock production (Boehlje 1996); from vertical integration (arrangements such as packers feeding cattle) and forward contracting to increasing... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Industrial Organization; Risk and Uncertainty; Agribusiness. |
| Ano: 2000 |
URL: http://purl.umn.edu/24046 |
| |
|
|
| Sun, Yan; Mwangi, Esther; Meinzen-Dick, Ruth Suseela. |
| Women’s participation in decision making at the user-group level and in forest committees has been demonstrated to have a positive impact on forest sustainability. For example, women’s participation enhances forest regeneration and reduces illegal harvesting through improved monitoring. Their presence in forest user groups increases the groups’ capacity to manage and resolve conflict, which in turn increases the likelihood that resource users will comply with and respect harvesting and use rules. These insights have been especially useful in informing policy and project interventions designed to strength and amplify women’s participation. This paper adopts a cross-national approach and employs quantitative techniques to analyze the relative... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Gender; Forest management; Forest user groups; Environmental Economics and Policy; Q01; Q23; J16. |
| Ano: 2011 |
URL: http://purl.umn.edu/103456 |
| |
|
|
| Govindasamy, Ramu; DeCongelio, Marc; Italia, John; Barbour, Bruce; Anderson, Karen. |
| Organic production has been practiced in the U.S. since the late 1940s. The distinction between organic and conventional produce is that organic produce is grown with a maximum of five percent synthetic pesticide residues and no prohibited USDA substance can be used on the land three years prior to producing organic produce. No genetic engineering is to be used on the crops, and no antibiotics are to be used on the livestock (USDA, 2001). Organic produce is sold at a premium above the price for conventional produce due to the increased production costs associated with following these rules. Price premiums vary greatly among different organic products and retail facilities. Consumers of these comparatively higher priced items traditionally have been the... |
| Tipo: Report |
Palavras-chave: Consumer/Household Economics; Food Consumption/Nutrition/Food Safety. |
| Ano: 2001 |
URL: http://purl.umn.edu/36736 |
| |
|
|
| Porto, Antônio José; Funari, Sílvia Regina Cunha; Dierckx, Sílvia Maria Alves Gomes. |
| Objetivo: Evaluar el desempeño del gusano de seda cuando se le alimenta con variedades de morera en diferentes edades de corte. Material y Método: Desarrollado en la Unidade de Pesquisa e Desenvolvimento de Gália, Sp, Brasil, da Agência Paulista de Tecnologia dos Agronegócios da Secretaria de Agricultura e Abastecimento do Estado de São Paulo, en el periodo comprendido entre el 31/12/1997 y el 06/05/1998. El experimento fue iniciado cuando larvas de Bombyx mori L., en el 32 instar, fueron alimentadas con dos variedades de morera (12 56/4 Y Korin) en cuatro edades de corte (7, 10, 13 Y 16 semanas), analizándose en el 5"' instar, caracteres biológicos y de producción de capullo. Resultados: Cuando se analizó cada variedad de morera en las diferentes edades... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal nutrition; Silkworms; Growth and development; Morus Nutrición animal; Gusanos de seda; Crecimiento y desarrollo; Morus nutrição animal; Bichos-da-seda; Crescimento e desenvolvimento; Morus. |
| Ano: 2004 |
URL: http://www.revistamvez-crmvsp.com.br/index.php/recmvz/article/view/3238 |
| |
|
|
| Ferreira, T. B.; Gotardo, A. T.; Górniak, S. L.. |
| Introdução: Nos últimos anos a constatação de que muitas substâncias produzidas para diferentes fins podem afetar o sistema endócrino dos animais é uma preocupação de grande importância toxicológica à medida que tais substâncias podem se tornar contaminantes ambientais. Por alterarem a homeostase de diferentes hormônios, tais substâncias passaram a ser chamadas de “desreguladores endócrinos” (DE). Um exemplo é a atrazina (ATR), herbicida, largamente utilizado na agricultura em várias partes do mundo, inclusive no Brasil. Assim, o presente trabalho foi delineado para avaliar o potencial DE da atrazina em caprinos machos. Para isto, os animais foram divididos em dois grupos; um experimental, que recebeu a atrazina (ATR, n=5), na dose de 7,5mg/kg/dia, via... |
| Tipo: Info:eu-repo/semantics/article |
|
| Ano: 2015 |
URL: http://www.revistamvez-crmvsp.com.br/index.php/recmvz/article/view/25727 |
| |
|
|
| Linné, Carl von. |
| Fragment of diary and annotations of different kinds taken during Linnaeus fil.'s stay in England. Includes: - Drawing of potted plant with 'Mr Smeathman, No 14 Clements Inn' on the reverse; - Folio sheets entitled 'Vegetables eaten in England', not in Linnaeus fil.'s hand; - Quarto sheets starting 'Solander reser med Joseph Banks...' on Banks's and Solander's circumnavigation with Captain Cook (between 1768 and 1771). Notes on chicken on the double sheet; - Octavo sheet on 'Levers. Mus', zoological notes. - Octavo sheet, with pencial drawing of flowers (Lilium?); - Slip with botanical notes on plantation of plants in London and Spain (watermelons, olive trees); - White folio sheet folded in four, with pencil annotations: the start of an address ('97... |
| Tipo: Collection |
|
| Ano: 2023 |
|
| |
|
|
| Linné, Carl von. |
| Collection of early notes on very different subjects, probably written during the first years of Linnaeus's student life. Many have been struck through, indicating they have been used in another of Linnaeus's manuscript, or published. Some have pagination. Includes the following material: - list of illnesses and pathological symptoms under the heading 'Evacuatorii'. Latin; - list of species of the genus "Erica". Latin and Swedish; - medical notes, Latin and Sweidsh. Short reference to 'Elizabeth Blackwell, Herbarium curiosum, Lond 1737 tab 500'. In 1739, von Haller wrote to Linnaeus alerting him to this new publication. See Albrecth von Haller to Carl Linnaeus, 11 January 1739, "The Linnaean correspondence", linnaeus.c18.net, letter L0270. Drawings of... |
| Tipo: Collection |
|
| Ano: 2023 |
|
| |
|
|
| Smith, Sir James Edward. |
| Smith writes on 11 July: Suffered a slight pleuratic attack. [Edward] Forster's wife's sister, Mrs Wishaw, is dying after being improperly managed by Mrs Williams following birth of her child, eating beef steaks and drinking wine not being permitted to suckle her child; the abundance of milk has induced a milk fever and is now in hopeless state. Thanks for Davall's assistance in determining 'Geranium molle', 'Geranium pyrenaicum', 'Geranium puscillum', and 'Geranium rotundifolium'. Responds to points in Davall's previous letters: happy to keep 'Schoenus ferrugineus'; 'Lamium laevigatum' not yet in seed; Davall can say what he pleases about 'Phaca alpina'; Davall's 'Stellaria biflora' correct, and also correct about [Anders Jahan] Retzius' [(1742-1821)]... |
| Tipo: Document |
|
| Ano: 2023 |
URL: http://linnean-online.org/62906/1/JES-COR-14-22_001.tif |
| |
| Registros recuperados: 158.175 | |
|
|
|
