A comprehensive national soil analysis spanning nearly three decades reveals significant improvements in China’s land quality and ecological resilience. The National Land Geochemical Monitoring Report 2025, released by the China Geological Survey under the Ministry of Natural Resources, examined over 500,000 data points collected between 1995 and 2023, providing an unprecedented longitudinal perspective on the nation’s geological health.
The study demonstrates that 92.6% of China’s land now qualifies as medium grade or higher in quality—a 0.4 percentage point increase since baseline measurements began. Research lead Peng Min attributes this enhancement to sustained implementation of major ecological initiatives including the Three-North Shelterbelt Forest Program, farmland-to-forest conversion projects, and widespread adoption of water conservation technologies.
Critical findings highlight the stability of foundational ‘skeleton’ elements—silicon, aluminum, iron, and magnesium—which maintain soil structural integrity and prevent desertification and salinization. Simultaneously, essential plant nutrients including nitrogen, phosphorus, potassium, and vital micronutrients like manganese, selenium, and iodine have shown moderate increases, suggesting positive implications for agricultural productivity and food security.
The most notable improvement emerged in soil organic carbon content, which rose from 6.7 to 7.8 grams per kilogram over the monitoring period. This component functions as both hydrological regulator and nutrient retainer, enhancing drought resistance while preventing fertilizer runoff. Particularly remarkable was the 141% surge in organic carbon on the Qinghai-Tibet Plateau, where climate warming and improved grazing practices have transformed the region into an increasingly effective carbon sink.
Researchers confirm the plateau’s growing significance in global carbon sequestration, with its enhanced capacity to absorb atmospheric carbon dioxide contributing to greenhouse effect mitigation. As China progresses into its 15th Five-Year Plan period (2026-2030), monitoring will intensify with 6,000 additional sites planned for key agricultural regions, alongside regular decadal national surveys and quinquennial regional assessments.