2026-10-13T20:03:33Z https://www.scidb.cn/oai

10.57760/sciencedb.IGA.00727 2023-11-06T16:06:59Z

2023-11-06 Helen City 1:250000 Grain Yield Distribution Dataset (2000) doi:10.57760/sciencedb.iga.00727 en a. Data content (data file/table name, including observation index content) Data File Name: Hulun City 1:250000 Grain Yield Distribution Dataset (2000) Main content: HlCereal2000 Data entity.shp b. Construction purpose This dataset mainly provides data support for research on the evolution and degradation process of black soil quality. c. Service object Students and researchers engaged in research in soil science, agriculture, and agricultural ecology. d. Time range of data The data source was in 2000 and was produced in 2006. e. The spatial range and projection method of data Space scope: Hailun City, Heilongjiang Province Helen City; Grain Yield Distribution; 2000 杜书立 PUBLIC https://creativecommons.org/licenses/by/4.0/ dataset Science Data Bank