土层厚度和腐殖质层厚度是土壤调查的重要内容之一,由于整地等因素的影响,不易准确地测定;以往主要根据经验来判断挖掘剖面的位置,如果调查人员经验不足,就会造成较大偏差甚至错误。整地有其固有的规律,具体分析这些规律并进行规范化调查将有助于我们获得可靠的土壤剖面资料。图是在不同立地、林分条件下带垦土壤纵 Thickness of soil layer and humus layer is one of the important contents of soil survey. Due to the influence of soil preparation and other factors, it is not easy to determine accurately. In the past, the location of the excavation section is mainly determined by experience. If the investigator is inexperienced, Deviations even wrong. Soil preparation has its own inherent laws. Analyzing these rules in detail and conducting a standardized survey will help us to obtain reliable soil profile information. Figure is in different sites, stand conditions with reclamation of soil longitudinal