一、前言 对发展中国家来讲,扩大粮食作物生产是为了解决吃饭问题。单靠手工劳动和畜力牵引作业并不能满足扩大农作物生产过程中提出的众多要求,因此必须实现农业机械化。但是,他们的农业机械化却不能象西德——它是工业发达国家中的典型——等国在第二次世界大战以来所采取的那种方式来 I. Preface To developing countries, the expansion of food crops is to solve the problem of eating. Rely on manual labor and animal power towing operations and can not meet the many requirements of expanding crop production process, it is necessary to achieve agricultural mechanization. However, their mechanization of agriculture can not be followed in the same way that West Germany did - since it was the quintessential example of industrialized nations - that was followed by the Second World War