August 29，Xu Wenhua, leader of the technical team of the Provincial Soil Census Office, and his delegation went to Yangling Sample Preparation and Circulation Center for research and guidance。

The research team inspected the sample temporary storage room of Yangling Sample Preparation and Transfer Center、Air drying room、Preparation Room、Quality Control Room、Saving room and other areas，Learn more about the operation of the preparation and circulation center and the number of preparations in a single day，Carefully checked the sample preparation process and quality control。The research team highly recognized the work results achieved by the circulation center in a short period of time，Indicates that the Yangling sample preparation and circulation center is the first preparation and circulation center for the third national soil census in Shaanxi Province，Require high dafabet mobile loginstandards、Strict requirements for sample preparation and circulation，Create a “model room” for other preparation center operations，Making positive contributions to promoting the third national soil census in Shaanxi Province。

Zhongshan Agricultural Construction Group、Relevant comrades from the Land Construction Research Institute conducted an investigation together。