VIETNAMESE firms have invested US$600 million in Cambodia’s rubber sector this year, according the head of a consortium representing 14 companies from across the border. Leng Rithy, the leading representative of the Vietnam Rubber Group in Cambodia, said Sunday that the capital has gone to plantations in Kratie, Kampong Thom, Preah Vihear, Ratanakkiri and Mondulkiri provinces, and more Vietnamese companies want to invest in the Kingdom. “We will have planted rubber trees on 100,000 hectares of land concessions from the government by 2012, and 10 processing plants will be built to produce dry rubber for exports to international markets,” he said.