Consulta: creatorFacets:"Laajimi,   Abderraouf"
Registros recuperados: 6
Data/hora: 13/06/2024 04:15:20

Managing nitrate pollution in a Tunisian irrigated area: A multi-criteria analysis approach
Provedor de dados: 31
Autores: Laajimi,   Abderraouf; Ben Nasr,   J.; Ferchichi,   M.
In Tunisia, the extension of irrigated area is justified by its important role in the development and diversification of agricultural production. Nevertheless, the strong intensification of the agricultural activities may lead to the pollution of underground water resources due to an excess use of fertilisers and other chemical products. In fact, the high nitrate concentrations observed in some Tunisian irrigated areas, are related to the excessive use of nitrate fertilizers in intensive agriculture. The objective of the present study is to implement decision-making methods allowing a better combination of factors production by optimization of an economic objective and an environmental objective. This research is based on multi-criteria modelling through...
Tipo: Conference Paper or Presentation
Palavras-chave: Nitrate pollution; Environmental impact; Multicriteria analysis; Environmental Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/44186

Analyzing supply response of fruit tree products in Tunisia: The case of peaches
Provedor de dados: 31
Autores: Laajimi,   Abderraouf; Guesmi,   Anis; Mahfoudhi,   A.; Dhehibi,   Boubaker.
In Tunisia, peaches have a significant place in the fruit tree sector. Planted areas have  been expanding ever since the eighties as a result of irrigation water extension and the  use of better yielding varieties. These factors resulted in high production levels and fruit exports  thereof.  However,  important  seasonal  and  annual  variation  of  fruit  supplies continues to characterize prices at both wholesale and consumption levels. To study the  response  of  peach  production  an  econometric  model  was  developed. Modelling  was carried out in two stages. First area variation was explained through new plantings and removals and second yield variation was analyzed. The methodological approach followed takes into account the characteristics and...
Tipo: Journal Article
Palavras-chave: Supply response; Modeling; Price expectations; Peaches; Demand and Price Analysis.
Ano: 2009
URL: http://purl.umn.edu/93801

Analyse de la Reponse de l'offre des Pommes en Tunisie : Une Approche Econometrique
Provedor de dados: 31
Autores: Laajimi,   Abderraouf; Guesmi,   Anis; Dhehibi,   Boubaker.
In Tunisia, the apples occupy a significant place on the sector of perennial crops. This crop covered expanded areas during the eighties following an extensive use of efficient water equipments. However, significant seasonal and annual variation of fruit supplies in the domestic market were frequently encountered affecting prices at both wholesale and consumption levels. To study the supply response of apples we carried out an econometric estimate of the model of supply response. Modelling was carried out in two stages: determination of the variation of the surfaces, on the basis of equation of news plantations and the equation of removals, and the variation of yields. The methodological approach that we followed takes account of the characteristics and...
Tipo: Conference Paper or Presentation
Palavras-chave: Supply response; Modelling; Expected prices; Apples; Demand and Price Analysis.
Ano: 2007
URL: http://purl.umn.edu/9392

Effects of food prices and consumer income on nutrient availability: An application of the demand for dairy products in Tunisia
Provedor de dados: 31
Autores: Dhehibi,   Boubaker; Laajimi,   Abderraouf.
Number of Tunisian food demand studies have measured the influence of traditional variables, such as income and prices, and in some cases some socio-demographic variables. However, given increasing concerns about health, other important factors, such as the nutritious quality and the nutrient content of food, have also been shown to determine consumer choices. This paper analyses the effect of these factors on the demand for dairy products. The nutritious quality of dairy products is measured by an index that relates nutrient content of each product with the standards suggested by the National Academy of Science. A demand system is estimated and nutrient demand elasticities with respect to prices and expenditure are obtained. Results differ from...
Tipo: Journal Article
Palavras-chave: Dairy products demand; Health awareness; Nutrients; Price/quality index; Tunisia; Agricultural and Food Policy; D12; I12.
Ano: 2009
URL: http://purl.umn.edu/57279

How Economic Factors Influence the Nutrient Content of Diets: an Application of Animal Products Demand System in Tunisia
Provedor de dados: 31
Autores: Dhehibi,   Boubaker; Laajimi,   Abderraouf.
Most of the literature on Tunisian food demand measures the influence of traditional variables such as income and prices, or some socio-demographic variables. However, nowadays other important factors determine the consumer's final choice, among which are: the nutritious quality, the nutrient content of food and the increasing concern about health. The objective of this paper is twofold. On one hand, the paper aims to analyse the effect of previous factors on meat consumer behaviour. On the other hand, to the author's knowledge, this may well be one of the first studies that use data to answer the previous questions in the case of Tunisia. The nutritious quality of meat is measured by an index that relates nutrient content of each product with the...
Tipo: Journal Article
Palavras-chave: Food Consumption/Nutrition/Food Safety.
Ano: 2004
URL: http://purl.umn.edu/26405

Assessment of sustainability in organic and conventional farms in Tunisia: The case of olive-growing farms in the region of Sfax
Provedor de dados: 31
Autores: Laajimi,   Abderraouf; Ben Nasr,   J.; Guesmi,   Anis.
This research has been carried out to study the sustainability of the Tunisian olive-growing farms and to compare the sustainability level of organic with conventional farms. A survey was conducted with 62 olive growers in the region of Sfax in Tunisia. First, a diagnosis of the situation of the farms was undertaken comparing between organic and conventional farms. Second, an empirical analysis was achieved to asses the sustainability of organic farms versus conventional farms following the French “IDEA” method developed by Vilain [1] 1. The “IDEA” indicators showed a greater ranking for the organic farms. The analysis indicated the sustainability of organic farming on the three scales adopted; ecological scale, through the soil fertility and reduction of...
Tipo: Conference Paper or Presentation
Palavras-chave: Sustainability; Organic farming; Tunisia; Environmental Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/44463