AgricultureEarth SciencesSoil SciencesSoil ClassificationSoil ScienceSoil SurveyMineral Soil ClassificationSoil BiodiversitySoil CompositionSoil TaxonomyChinese Soil TaxonomySoil Classification CriteriaSoil Classification SystemsSoil Taxonomic ClassificationSoil Taxonomy CriteriaSoil Taxonomy InterpretationTaxonomic Classification SchemesTaxonomic Soil Criteria
Based on the information from the 2nd national soil survey and the diagnostic criteria of Vertosols in Chinese Soil Taxonomy,this paper discusses the taxonomic classification of the soil-species of Shajiang black soils in its main distribution regions in China,i.e.,Anhui,Henan,Jiangsu and Shandong provinces.The preliminary results showed that among the total 54 soil-species of Shajiang black soils,34 soil species,with an area of 228?104 hm2,could be classified as Vertosols,among of which,26 as Shajiang Calci-Aquic Vertosols and 8 as Typical Calci-Aquic Vertosols respectively,the other soil-species of Shajiang black soils could be categorized as Shajiang-Aquic Cambosols or Aqui-Alkalic Halosols.The diagnosis of these kinds of soils should focus more on the black clay layer rather than the carbonate concrete layer which determines only the lower categories.