国土经济学研究会提出新时期的任务是非常好的。现在国家实施西部大开发战略，有必要总结建国以来开发东北、华南、沿海的经验和教训。如原来我国开发华南地区橡胶以及热带作物，就值得总结经验教训。当时，我国与苏联订立协议合作在华南开发橡胶２０万吨，以应变世界大战。为 Land Economics Research Council proposed the task of the new era is very good. Now that the state implements the strategy of developing the west, it is necessary to summarize the experiences and lessons learned from developing the northeast, south China and the coastal areas since the founding of the People’s Republic. As the original development of rubber and tropical crops in southern China, it is worth summing up experience and lessons. At that time, our country and the Soviet Union entered into an agreement to cooperate to develop 200,000 tons of rubber in southern China so as to meet the challenge of world war. for