2026-10-14T05:50:40Z https://www.scidb.cn/oai

10.57760/sciencedb.IGA.00725 2023-11-06T16:07:05Z

2023-11-06 Long term soil positioning observation dataset at Helen Station (1985-1994) doi:10.57760/sciencedb.iga.00725 en a. Data content (data file/table name, including observation index content) Data File Name: Helen Station Soil Long Term Positioning Observation Dataset (1985-1994) Contains 3 tables: Excel (1) Soil nutrient observation dataset (2) Dataset on the fate of nitrogen fertilizer in black soil farmland (3) Black soil farmland phosphorus fertilizer residual efficiency dataset This includes indicators such as nutrient supply capacity, nutrient release, crop nutrient content, soil nutrient content, nutrient budget, soil residual nitrogen, 15N abundance, soil residual fertilizer phosphorus, available phosphorus rate, and phosphorus concentration at the Helen Experimental Station. b. Construction purpose Study the changes in soil nutrients under different field management methods, the fate of fertilizer nitrogen under crop rotation, and the residual problems of phosphorus fertilizer in the soil, in order to promote the sustainable development of ecological agriculture. c. Service object Students, managers, and researchers engaged in research on nutrient cycling and soil fertility in farmland d. Time range of data The data was collected from 1985 to 1994 e. The spatial range and projection method of data Helen's long-term positioning experimental station. Helen Station; Long term soil positioning obs; 1985-1994 付微 PUBLIC https://creativecommons.org/licenses/by/4.0/ dataset Science Data Bank