2026-10-15T03:37:03Z https://www.scidb.cn/oai

10.57760/sciencedb.IGA.001c3 2026-08-31T11:24:25Z

2026-08-31 Statistical Table of Annual Farmland Soil Basic Fertility Indicators in Northeast China (2007–2021) – Data doi:10.57760/sciencedb.iga.001c3 en Soil fertility is the core foundation of cultivated land productivity, and its long-term evolutionary trends are directly related to national food security and agricultural sustainable development. Heilongjiang Province, as China's largest commodity grain production base, has changes in cultivated land soil fertility that significantly impact regional and even national stable grain yield and production increase. This dataset spans from 2007 to 2021, systematically documenting the annual variations of basic soil fertility indicators in the cultivated lands of Heilongjiang Province. The data include five core soil fertility indicators: soil organic matter, pH, alkali-hydrolyzable nitrogen, available phosphorus, and rapidly available potassium. The data are provided in Excel spreadsheet format and are applicable for analyzing the long-term evolutionary trends of cultivated land soil fertility in Heilongjiang Province, nutrient grade distribution characteristics, and soil fertility change patterns. This dataset can provide solid data support for cultivated land quality assessment, scientific fertilization scheme formulation, and black soil protection strategy optimization. Soil Fertility; Long-term Evolution; Cultivated Land Quality 姜佰文 PUBLIC https://creativecommons.org/licenses/by/4.0/ dataset Science Data Bank