壤耕耘作业中,拖拉机发动机的动力主要消耗于克服犁耕阻力所作的机械功上。为了合理地利用发动机的功率和节省燃料,必须研究犁耕阻力的来源,并探讨其降低的办法。 降低犁耕阻力的问题,人类业已探索了几千年。这种探索是推动犁的发展的主要动力之一。 In soil-tilling work, the power of the tractor engine is mainly consumed by the mechanical work done to overcome the resistance to plowing. In order to make rational use of engine power and fuel savings, it is necessary to study the sources of plowing resistance and to explore ways to reduce it. The problem of reducing the resistance to plowing has been explored by humankind for thousands of years. This exploration is one of the major driving forces behind the development of plows.