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| Registros recuperados: 242 | |
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| Benkeblia,Noureddine. |
| The respiration rate (RR) (CO2 production), activation energy (Ea) and Q10 of maleic hydrazide-treated onion bulbs (Allium cepa, cv. Rouge Amposta) at 20.10-6 mol.L-1 (MH1) and 45.10-6 mol.L-1 (MH2) were measured at 4, 10 and 20ºC. Immediately after treatment, the Q10 of MH-treated and control bulbs were not significantly different. After 8 weeks of storage, Q10 of control and both MH-treated bulbs increased and ranged from 2.34 and 2.89. Respiration rate of onions increased during storage, and after 24 weeks, RR values of control, MH1 and MH2 were 0.43, 0.32 and 0.26 mmol CO2.kg-1.h-1 at 20ºC respectively; and 0.26, 0.20 and 0.17 mmol CO2.kg-1.h-1 at 10ºC respectively. At 4ºC, no significant difference was observed between control and MH-treated bulbs.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Activation energy; MH; Onion; Q10; Respiration rate; Sprouting; Storage. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202004000100007 |
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| Chaulet,Anouk; Vatnick,Itzick; Rodríguez,Enrique M.. |
| Growth, metabolic rate, and energy reserves of Cherax quadricarinatus (von Martens, 1868) juveniles were evaluated in crayfish acclimated for 16 weeks to either 25ºC (temperature near optimum) or 20ºC (marginal for the species). Additionally, the modulating effect of ecdsyone on acclimation was studied. After 12 weeks of exposure, weight gain of both experimental groups acclimated to 25ºC (control: C25, and ecdysone treated: E25) was significantly higher than that of those groups acclimated to 20ºC (C20 and E20). A total compensation in metabolic rate was seen after acclimation from 25ºC to 20ºC; for both the control group and the group treated with ecdysone. A Q10value significantly higher was only observed in the group acclimated to 20ºC and treated with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Energy reserves; Growth; Metabolic rate; Q10. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212013000200009 |
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| Kostandini, Genti; Mykerezi, Elton; Tanellari, Eftila. |
| We investigate the determinants of organic farming in the United States. State-level data show that the organic farming sector has grown over the last decade, but growth has been very heterogeneous with few states accounting for most of the growth. Further analyses of county data reveal that favorable natural amenities, water for irrigation, and government payments have a positive effect on most measures of organic farming used here. Results further point out that organic farming operations are more popular among young farmers. Adjacency to metro areas is also an important determinant for the number of organic operations. Organic farming is more important for the agricultural sector of the areas that are somewhat remote but that does not appear to be the... |
| Tipo: Journal Article |
Palavras-chave: County; Organic farming; Rural; Community/Rural/Urban Development; Marketing; Q10; R58. |
| Ano: 2011 |
URL: http://purl.umn.edu/113539 |
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| Siebert, John W.; Hagerman, Amy D.; Park, John L.. |
| The fast-growing US ethanol industry has historically been characterized by large downstream investments made by farmers. The authors assess the value which the stock market may hold for downstream investment by farmers as well as by ethanol manufacturers themselves. The model framework used herein expands on the original VEST framework developed by Siebert, Jones and Sporleder. A word of caution, the model herein is not intended to provide an on-going, risk-reducing business strategy. However, it can and does provide a quick method to calculate the reasonableness of a downstream investment request that a farmer (or any business person) might be challenged to consider. Although virtual stock market investments may certainly assist in value added... |
| Tipo: Journal Article |
Palavras-chave: Cooperatives; Corn; Equities; Ethanol; Value added; Resource /Energy Economics and Policy; Q10; Q32. |
| Ano: 2008 |
URL: http://purl.umn.edu/53737 |
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| Tchetchik, Anat; Fleischer, Aliza; Finkelshtain, Israel. |
| This paper applies a discrete-choice framework with product differentiation to model the rural tourism industry in Israel and to jointly estimate the effect of lodging and farm characteristics on consumer preferences and firms' costs. The model accounts for heterogeneity in tastes and technologies and allows for unobservable product characteristics. We find evidence for technological synergy in joint production of farming and rural hospitality, but none in the demand. The differentiation in the industry is vast and is the major contributor to the price-cost margin, which averages 62%. An additional minor cause are government regulations, which restrict supply. Simulation results demonstrate the growth potential of the industry and show that the government... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Rural tourism; Differentiated goods; Oligopoly markup; Community/Rural/Urban Development; Q10; L11; L83. |
| Ano: 2006 |
URL: http://purl.umn.edu/7178 |
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| Russo, Carlo; Sabbatini, Massimo. |
| We use original data to assess if the current incentives to farmer turnover may help the competitiveness of small farms in the Lazio Region (central Italy). Our results show that substantial changes in the policy may be needed. The paper analyzes sharp declining trend in small farm number, discusses its causes and evaluates the policies that have been adopted to stop or slow down this downfall. The regional policy makers consider the ageing of the farmers is a key determinant of the decline of small farms. Consequently, they have designed an incentive policy to generational turnover mainly based on installation payments. Given our empirical findings we conclude that this policy may fail to achieve the stated objectives. Firstly, farms that had a... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Generational turnover in Agriculture; Installation payments; Agricultural and Food Policy; Q10; Q18. |
| Ano: 2009 |
URL: http://purl.umn.edu/52843 |
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| Buhle, Eric; Margolis, Michael; Ruesink, Jennifer L.. |
| Strategies for controlling invasive species can be aimed at any or all of the stages in the life cycle. In this paper we show how to combine biological data on population dynamics with simple economic data on control cost options to determine the least costly set of strategies that will halt an invasion. We then apply our methods to oyster drills (Ocinebrellus inornatus), an economically important aquaculture pest that has been accidentally introduced worldwide. If the costs of intervention were the same across life stages, extermination of adults would be an inefficient way to control species with the population dynamics characteristics of invaders. In the oyster drill case, however, efficient control targets adults because they are much easier to find. |
| Tipo: Working or Discussion Paper |
Palavras-chave: Invasive species; Bioeconomics; Control strategies; Environmental Economics and Policy; Q10; Q2; Q22. |
| Ano: 2004 |
URL: http://purl.umn.edu/10793 |
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| Registros recuperados: 242 | |
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