Complex sentence: After the World War I the French colonial government had allocated huge blockes of forerst land to metropolitan corporations; from 1920 on, large amounts of capital became available to construct roads, nurture rubber seedings clear land, and plant saplings.
Split into simpler sentences: After the World War I the French colonial government had allocated huge blockes of forest land to developments. From 1920 on, large amounts of capital became available to construct roads, nurture rubber seedings clear land, and plant saplings.