Document présenté au 1st Symposium of the Flore du Cambodge, du Laos et du Viêtnam: From forest to cultivation: Replanting high value forest tree species by using Rubber trees (Hevea brasiliensis) as relay crop.Feeding the link between biodiversity reservoir and economic productionwill contribute to "give a value to the biodiversity" information’and illustrate the fact that?a standing forest worth much more than a cut back one !!