2026-10-14T04:28:53Z https://www.scidb.cn/oai

10.57760/sciencedb.IGA.00730 2023-11-06T16:06:23Z

2023-11-06 1:250000 Animal Husbandry Spatial Dataset in Helen City (1990) doi:10.57760/sciencedb.iga.00730 en a. Data content (data file/table name, including observation index content) Data File Name: 1:250000 Livestock Husbandry Spatial Dataset in Helen City (1990) Main content: HlHusbanry1990.shp b. Construction purpose This dataset mainly provides data support for the study of the evolution and degradation process of black soil quality. c. Service object Students and researchers engaged in research on agricultural ecology and animal husbandry. d. Time range of data The data source was in 1990 and was produced in 2006. e. The spatial range and projection method of data Space scope: Hailun City, Heilongjiang Province Helen City; Animal Husbandry; 1990 杜书立 PUBLIC https://creativecommons.org/licenses/by/4.0/ dataset Science Data Bank