随着我国农业生产的高速度发展和化肥工业的逐年增长,如何进一步发挥土壤的活在肥力和提高化肥的经济效益,已愈来愈得到人们的重视。要达到上述目的,改善土壤的环境条件,特别是改善土壤的物理环境条件,是一项重要的关键性措施,而土壤的结构又是影响土壤环境条件的基本因素。我国农民在长期的耕作过程中,对土壤结构的认识和培育积累有极为丰富的经验,如北京郊 With the rapid development of agricultural production in our country and the year-by-year growth of chemical fertilizer industry, how to further exert the living fertility of the soil and increase the economic benefits of chemical fertilizers have drawn more and more attention. To achieve the above objective, improving the environmental conditions of the soil, especially improving the physical and environmental conditions of the soil, is an important and crucial measure. The structure of the soil is also a basic factor that affects the environmental conditions of the soil. In the long-term farming process, our peasants have a wealth of experience in understanding and nurturing soil structures such as Beijing’s suburbs