2026-10-12T06:03:06Z https://www.scidb.cn/oai

10.57760/sciencedb.IGA.00601 2023-10-13T16:19:26Z

2023-10-13 1:200000 Soil Total Nitrogen Distribution Dataset in Heilongjiang Province (1992) doi:10.57760/sciencedb.iga.00601 en a. Data content (data file/table name, including observation index content) Data File Name: Heilongjiang Province 1:200000 Soil Total Nitrogen Distribution Dataset (1992) b. Construction purpose This dataset mainly provides data support for the study of soil quality evolution and soil fertility improvement in black soil farmland. c. Service object Students and researchers engaged in soil science and agricultural ecology research. d. Time range of data The data was completed in 1992. e. The spatial range and projection method of data Space scope: Heilongjiang Province Heilongjiang Province; 土壤全氮分布; 1992 杜书立 PUBLIC https://creativecommons.org/licenses/by/4.0/ dataset Science Data Bank