World 1: 5 million black soil distribution dataset (1970,1972-1973,1976-1978)

a. Data content (data file/table name, including observation index content) The World 1:5 million Black Soil Distribution Dataset (19701972-19731976-1978) reflects the distribution of black soil worldwide, including information on soil units, soil types, and other factors. b. Construction purpose Clarify the distribution of black soil in the world and provide data support for comparative research on black soil in the world. c. Service recipients Used by scientific and technological workers engaged in soil science and related research. d. Time range of data 1970,1972-1973,1976-1978 e. The spatial range of data The Four Black Soil Regions of the World