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| Registros recuperados: 16.191 | |
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| Aadland, David; Anatchkova, Bistra; Grandjean, Burke; Shogren, Jason F.; Simon, Benjamin; Taylor, Patricia A.. |
| We report the findings of a unique nation-wide experiment to price access to our public lands. In 2004, the U.S. Federal Lands Recreation Enhancement Act mandated the creation of a new annual pass to cover all federal recreation sites that charge an entrance or access fee. Our task was to assist federal policymakers in determining an appropriate price for this new pass. Toward that end, we administered a contingent valuation phone survey to over 3700 households to estimate households willingness to pay (WTP) for the new pass at a variety of different prices. Our innovative experimental design allows us to estimate the degree of hypothetical bias in the sample and calibrate our WTP estimates to reflect actual purchasing decisions. In a sample of the... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Land Economics/Use. |
| Ano: 2007 |
URL: http://purl.umn.edu/9789 |
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| Aagaard-Hansen, J.; Larsen, C.E. Schou; Halberg, N.; Hjortsø, C.N.; Gausset, . Q.; Kabirizi, J.. |
| Conventional research approaches have lost considerable momentum after their astonishing achieve-ments during the green revolution. The negative side of focusing rigorously on production improve-ment was eminent around 1980 and led to considerations of environmental, gender and equity aspects - making agricultural development much more complex than previously. In the search for new ways of addressing the persisting problems of food insecurity and malnutrition, new ways should be explored. Based on the experiences from three international, African research projects, the article argues the case of participatory action research and cross-disciplinarity as some of the key elements in future animal science research in developing countries. The benefits are... |
| Tipo: Journal paper |
Palavras-chave: Social aspects; Animal husbandry. |
| Ano: 2007 |
URL: http://orgprints.org/15516/1/15516.pdf |
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| Aakre, Dwight G.; Haugen, Ronald H.; Swenson, Andrew L.. |
| The National Corn Growers Association Public Policy Team’s Base Revenue Projection Program (BRP) and the Revenue Countercyclical Program (RCCP) were analyzed. The analysis was done for soybeans using the BRP-RCCP calculator, as developed by the National Corn Growers Association. Three representative counties (Cass, Stutsman and Benson) were chosen in North Dakota. Historic and projected data were used to analyze 2002 to 2010 crop years. A comparison of the BRP-RCCP programs to the current farm program was done. From 2002 to 2005, all counties would have received more payments with the BRP-RCCP program than they would have received under the current farm program. Benson County would benefit the most from this program, receiving $58.56 per acre more during... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Farm bill; Soybeans; Countercyclical payments; Revenue; Agricultural Finance; Crop Production/Industries. |
| Ano: 2007 |
URL: http://purl.umn.edu/7301 |
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| Aakre, Dwight G.; Haugen, Ronald H.; Swenson, Andrew L.. |
| The National Corn Growers Association Public Policy Team’s Base Revenue Projection Program (BRP) and the Revenue Countercyclical Program (RCCP) were analyzed. The analysis was done for spring wheat using the BRP-RCCP calculator, as developed by the National Corn Growers Association. Three representative counties (Hettinger, Ward and Cavalier) were chosen in North Dakota. Historic and projected data were used to analyze 2002 to 2010 crop years. A comparison of the BRP-RCCP programs to the current farm program was done. From 2002 to 2005, Ward County would have received nearly identical payments under the BRP-RCCP program and the current farm program. The Hettinger County farm would have received considerably more under the BRP-RCCP program - $76.87 per... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Farm bill; Wheat; Countercyclical payments; Revenue; Agricultural Finance; Crop Production/Industries. |
| Ano: 2007 |
URL: http://purl.umn.edu/7300 |
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| Aakre, Dwight G.; Haugen, Ronald H.; Swenson, Andrew L.. |
| The National Corn Growers Association Public Policy Team’s Base Revenue Projection Program (BRP) and the Revenue Countercyclical Program (RCCP) were analyzed. The analysis was done for corn using the BRP-RCCP calculator, as developed by the National Corn Growers Association. Three representative counties (Richland, Barnes and Foster) were chosen in North Dakota. Historic and projected data were used to analyze 2002 to 2010 crop years. A comparison of the BRP-RCCP programs to the current farm program was done. For 2002 to 2005, Barnes County would have received more total payments under the BRP-RCCP program than with the current farm program. The gain would have been $24.12 per acre during the four years. Richland and Foster counties would have received... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Farm bill; Corn; Countercyclical payments; Revenue; Agricultural Finance; Crop Production/Industries. |
| Ano: 2007 |
URL: http://purl.umn.edu/7302 |
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| Aakre, Dwight G.; Vreugdenhil, Harvey G.. |
| This report summarizes the 2007 results of the North Dakota Land Valuation Model. The model is used annually to estimate average land values by county, based on the value of production from cropland and non-cropland. The county land values developed from this procedure form the basis for the 2007 valuation of agricultural land for real estate tax assessment. The average "all land value" from this analysis is multiplied by the total acres of agricultural land on the county abstract to determine each county's total agricultural land value for taxation purposes. The State Board of Equalization compares this value with the total value assessed to agricultural property in each county. Each county is required by state statute to assess a total value of... |
| Tipo: Report |
Palavras-chave: Land valuation; Real estate assessment; Agricultural land; Land Economics/Use. |
| Ano: 2007 |
URL: http://purl.umn.edu/7638 |
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| Abascal, F; Cosson, J; Fauvel, Christian. |
| Computer assisted sperm analysis (CASA) was used to characterize the motility of sea bass Dicentrarchus labrax spermatozoa and to study the effect of several physicochemical variables and heavy metals on sperm swimming performance. Duration of sperm motility in sea bass was very short (< 50 s). During the first 20 s all the motility variables measured remained approximately constant, the velocity and linearity of the movement being maximum during this period, while both variables decreased sharply later. While slight variations in pH did not significantly modify sperm swimming performance, changes in osmolality affected all the measured motility variables. Two of the heavy metals tested, Cu2+ and Pb2+, did not affect sperm motility when the activating... |
| Tipo: Text |
Palavras-chave: Sperm; Heavy metals; Dicentrarchus labrax; CASA. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-4765.pdf |
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| Abbink, Klaus; Jayne, Thomas S.; Moller, Lars C.. |
| • Strategic interaction between market players affects the performance of grain markets and the risk of food crises. Strategic dilemmas can arise if traders don’t trust government announcements on future maize purchases or if the government does not trust stock estimates provided by the private sector. • Government “pre-commitment” (announcing in advance how and when it will operate in the market and then behaving in a consistent manner) is found to produce superior welfare outcomes to “discretionary intervention” whereby the government operates in an unpredictable and ad hoc manner in markets. Situations of food shortage and over-supply were much more frequent under a discretionary policy environment because of the risk of poor coordination between the... |
| Tipo: Report |
Palavras-chave: Food security; Food policy; Zambia; Maize; Marketing; Crop Production/Industries; Q20. |
| Ano: 2007 |
URL: http://purl.umn.edu/54636 |
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| Abbott,Liliana A; Pistorale,Susana M; Filippini,Olga S. |
| Trece genotipos de Bromus catharticus (cebadilla criolla) fueron evaluados para rendimiento en semilla en 2001 y 2002, usando un diseño completamente aleatorizado con seis repeticiones por genotipo. Se analizaron las correlaciones y el coeficiente de sendero para nueve caracteres relacionados con la producción de semilla. La variabilidad genotípica fue estadísticamente significativa para número de semillas totales por panoja en el segundo año (p = 0,019), largo de hoja bandera en los dos años (p = 0,039 y 0,045) y número de macollos por planta en el primer año (p = 0,003). La interacción genotipo x ambiente fue significativa para número de macollos por planta (p = 0,003), número de panojas por planta (p = 0,010), ancho de hoja bandera (p = 0,010) y peso de... |
| Tipo: Journal article |
Palavras-chave: Cebadilla criolla; Componentes del rendimiento; Correlaciones fenotípicas. |
| Ano: 2007 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202007000200007 |
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| Abboud,C.S.; Ferreira,C.E.S.; Barbosa,V.L.B.; Araújo,D.A.C.; Zandonadi,E.C.; Pasternak,J.. |
| We reported a case of septicemia by Vibrio cholerae O1, in São Paulo, Brazil. A 70-year-old male patient, living in an urban area, entered the emergency service having sepsis, dying 12 hours later. Blood culture was positive for Vibrio cholerae O1. This is the first case of bacteremia by Vibrio cholerae O1 reported in South America. |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Vibrio cholerae O1; El Tor; Septicemia. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702007000200028 |
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| Abdallah, Vanessa Doro; UFRRJ; Azevedo, Rodney Kozlowiski de; UFRRJ; Luque, José Luis; UFRJ. |
| Foram estudados 100 tamboatás Hoplosternum littorale (Hancock, 1828) provenientes do rio Guandu, coletados próximo à barragem da Estação de tratamento de água (ETA) (22°48’32”S, 43º37’35”O), no Estado do Rio de Janeiro, no período de maio de 2004 à fevereiro de 2005. Oito espécies de metazoários parasitos foram coletadas e identificadas. O digenético Kalipharynx sp. foi a espécie mais prevalente (61%), seguido pelo hirudíneo Glossiphoniidae gen. sp. (20%) e a metacercária progenética de Herpetodiplostomum caimancola (Dollfus, 1935) (11%). Nenhum parasito apresentou correlação significativa entre o comprimento total do corpo do hospedeiro e sua abundância. O sexo dos hospedeiros influenciou a abundância de Kalipharynx sp., sendo os machos os mais... |
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Palavras-chave: 2.13.00.00-3 Parasitologia Hoplosternum littorale; Tamboatá; Rio Guandu; Parasitos; Brasil. |
| Ano: 2007 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/407 |
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| Abdel Wahab, O.. |
| The present investigation deals with the utilization of marine green algae (GA), Ulva lactuca, and an activated carbon prepared from green algae (CGA) as adsorbents for the removal of copper from wastewater. A series of experiments were conducted in a batch system to evaluate the effect of system variables. The effect of pH, initial copper concentration, dose of adsorbents were considered. The optimal pH value of copper (II) adsorption onto GA and CGA was found to be pH 5.0. The maximum uptake capacities were 24.5 and 32.3 mg copper (II) per gram of GA and CGA, respectively. The efficiency of removal was slightly changed by replacing an aqueous solution by saline water or wastewater containing the same copper concentration. Adsorption kinetic data were... |
| Tipo: Journal Contribution |
Palavras-chave: Laboratory Study; Adsorption; Kinetics; Isotherms; Waste water; Adsorption; Http://aims.fao.org/aos/agrovoc/c_137. |
| Ano: 2007 |
URL: http://hdl.handle.net/1834/1910 |
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| Abdel-Halim, A.M.; Aboel-Khair, E.M.; Fahmy, M.A.; Shridah, M.A.. |
| Environmental Information and Monitoring Programme (EIMP) for the Egyptian coastal waters of Aqaba Gulf was established to initial monitoring and data base system by applying quality control assessments in order to evaluate, protect and sustainable use of coastal regions. Within the framework of this programme six bimonthly field campaigns were carried out annually during 1998 – 2004. A total of 11 coastal stations were selected to cover different locations of the Gulf. The surface distribution patterns of hydrographical parameters (water temperature, salinity, dissolved oxygen and pH) as well as chlorophyll-a, total suspended matter, transparency, nitrogen and phosphorus forms and reactive silicate were investigated. The obtained data of seven years work... |
| Tipo: Journal Contribution |
Palavras-chave: Environmental Field Study; Coastal waters; Hydrographic data; Environmental assessment; Coastal waters. |
| Ano: 2007 |
URL: http://hdl.handle.net/1834/1911 |
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| Registros recuperados: 16.191 | |
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