2026-10-11T11:26:39Z https://www.scidb.cn/oai

10.57760/sciencedb.IGA.00914 2023-12-25T16:08:44Z

2023-12-25 Dataset of Soil Nutrient Grading in Northeast China (1979-1990) doi:10.57760/sciencedb.iga.00914 en a. Data content (data file/table name, including observation index content) Data file name: Northeast Region Soil Nutrient Grading Dataset (1979-1990) Includes 1 table: Excel (1) Soil nutrient classification dataset It includes indicators such as area, organic matter, total nitrogen, available phosphorus, available potassium, and calcium carbonate. b. Construction purpose Provide data services for the study of nutrient cycling in farmland soil in the black soil area of Northeast China. c. Service recipients Engaged in research, management, and research personnel in related disciplines such as soil science. d. Time range of data The data collection period is from 1979 to 1990 e. The spatial range and projection method of data Northeast region Northeast China; Soil Nutrient Grading; 1979-1990 付微 PUBLIC https://creativecommons.org/licenses/by/4.0/ dataset Science Data Bank