Les Balantes de la région de Tombali en Guinée Bissau ont développé un système social contraignant, basé sur le contrôle de la main d'oeuvre et la redistribution sociale des richesses et excédents selon un principe de réciprocité sur des bases sociales, fanado ou passage de classe et...

A few decades ago rubber was one of the first tree crops to be characterized by a spectacular breakthrough, the production of new, highly productive clonal material. With regard to rubber, the adoption of clonal planting materials led to a spectacular improvement in labour-productivity and...

As with cocoa a combination of available land and centres with fairly dense population is a prerequisite for a boom. But in the case of rubber the boom has been far more progressive than that for cocoa due to 3 main factors. Firstly, Sumatra and Kalimantan islands were almost empty at the turn...

The aim of this chapter is to describe changes in the Indonesian jungle rubber system from the angle of the production of innovation by farmers themselves (indigenous knowledge) and the process of integration of external technical innovations in an overall process of creation of innovation. In...

Smallholder rubber plantations in Indonesia, representing more than 80% of the total rubber areas, are very unique in the world. Most smallholder rubber areas are multi-strata in nature. Rubber is not the only perennial crop in that area, but also mixed with timber trees (forest re-growth),...

The type (antixenosis or antibiosis) of resistance against the aphids Myzus persicae (Sulzer) and Macrosiphum euphorbiae (Thomas) was characterized for the wild tuber-bearing potatoes, Solanum chomatophilum Bitter and Solanum stoloniferum Schltdl. & Bouché through behavioral (olfactometry and...

La réforme de la PAC offre l’opportunité de proposer des pistes d’amélioration des mesures agroenvironnementales (MAE). L’analyse des facteurs de choix d’une MAE par les agriculteurs peut mettre en évidence les leviers mobilisables pour augmenter leur participation à ce dispositif....

Natura 2000 is a European Union’s network of protected areas. In France, all forest owners whose forest is located in a Natura 2000 site could enroll in Natura 2000 program. After enrollment, the forest owner will benefit from a financial support which covers all theadditional cost due to...

There is a wide consensus among international institutions and national governments in favor of compact (i.e. densely populated) cities as a way to improve the ecological performance of the transport system. Indeed, when both the intercity and intra-urban distributions of activities are given, a...