Study On The Classification Of Soil Containing Artifacts

After the industrial revolution, the human effects on soil evolution are becoming profound with the accelerated process of urbanization and industrialization. The classification of soil containing artifacts in WRB(World reference bsae for soil resources) and ST(Soil Taxonomy) has been systematic, but there is little research on the classification of soil containing artifacts in Chinese soil taxonomy. The research on the classification of soil containing artifacts will help to clarify the diagnostic basis and the type of soil in Chinese soil taxonomy.10 typical soil profiles are selected in Henan Province as the research object, compared with 3 natural profiles in the physical, chemical properties and profile form. WRB and ST are used to classify the soil. After adaptability evaluation of ST and WRB for soil containing artifacts, proposal scheme is put forward about Chinese soil taxonomy applying on the soil containing artifacts. And classify the types of soil containing artifacts using the proposed projects in Henan Province. The results are as follows:(1) The soil layers containing artifacts are messy; the intrusion of artifacts change the physical and chemical properties of soil: the soil bulk density value is reduced by the presence of the ash layer in the profiles affected by the ancient human being, and other typical soil profiles duing to road construction, garbage accumulation or soil reclamation make the soil bulk density become larger; the content of coarse bone substance in the soil containing artifacts is significantly increased; the p H and EC of the soil containing concrete, calcareous building materials, coal gangue and flyash are slightly increased; the content of organic carbon in reclaimed soil is low, but it is high in soil with living garbage; the total phosphorus content of the soil containing the relics of the ancient human activity was slightly higher.(2) WRB、ST and CST are used to classify the soil containing artifacts. It is found that WRB is not suitable for all the test soil, and the property of soil containing artifacts is only reflected in entisols in ST.(3) Soil containing artifacts is defined, and artificial disturbance level is added. Adding a subgroup with the "technology" as the prefix in a group which meet the artificial disturbance level, and the subgroup will be retrieved firstly. Categories of artifacts have been added to the standard of soil family division, with the other four used together.A systematic study of the soil containing artifacts and the proposal scheme is proposed for the classification of soil containing artifacts for the first time filling the gaps in the research of soil containing artifacts to a certain degree in China. Further studying and classifying scientifically of the soil containing artifacts are of great significance to improve the understanding of this kind of soil and serve for the landscape planning and urban construction.