Irrigated durum wheat is a staple food crop that occupies important areas in Tunisia. However, its performance remains weak, with an average national yield of no more than 3.6 tons ha−1 and low profitability. Overall, on-farm wheat production will need to increase considerably to meet future demand and ensure minimum profitability for farmers. To t...
International audience
Une réponse économique : 1ère partie : le temps et l'argent, Une réponse sociale : 2ème partie : la santé et la sécurité, Une réponse environnementale : 3ème partie : la collectivité
Natural rubber demand was 11 million tons in 2014 and is expected to reach 16 million tons by 2025 according to the International Rubber Study Group (IRSG). The expected limitation of natural rubber from Hevea induced an interest for the development of alternative sources of natural rubber. Guayule (Parthenium argentatum Gray L.), being native to t...
The economic internal rate of return (EIRR) is considered as a useful tool for advocating investments in the field of land rehabilitation and poverty alleviation and it is also presented as an economic evaluation tool. This communication reviews main literature referring to EIRR and discusses its relevance, in particular for short-term and small si...
The paper goes on discuss this spatial structure in the context of three issues that have been raised in the literature: the relationships between rates and physical distance; the role of market conditions and rates; and, the relationships between rates and economic development. From this examination, questions are raised involving long held assump...
