野外调查是土壤普查的中心环节,它直接影响土壤普查成果的质量。因此,野外调查时,一定力求全面、深入、准确,忌带主观性、片面性和表面性;对发现的每一个问题和现象,都要反复观察,多方验证,使获得的材料尽量符合客观实际。 一般来说,土壤普查的野外调查,分概查和详查两个阶段进行。概查是为详查作技术准备,详查是完成土壤普普预定的全部内容,二者不可缺一。 Field surveys are the central part of the soil census and have a direct impact on the quality of the soil census results. Therefore, in the field investigation, we must strive to be comprehensive, thorough and accurate, and avoid subjectivity, one-sidedness and superficiality. We must observe and verify repeatedly on each of the problems and phenomena we have discovered, so that the materials obtained are as objective as possible. In general, the field survey of soil censuses, sub-survey and detailed investigation carried out in two stages. Survey is to make detailed investigation for technical preparation, detailed investigation is to complete all the content of soil preparation, both indispensable.